cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Electrochemically Deposited Nanostructured ZnO Films on Conductive ZnO:Al/Ag/ZnO:Al Stack Glass Substrates
Creators: name: Petrov, M.
name: Lovchinov, K.
name: Ganchev, M.
name: Angelov, O.
name: Dimova-Malinovska, D.
Publisher: name: WIP
Year: 2013
Subjects: MATERIAL STUDIES, NEW CONCEPTS, ULTRA-HIGH EFFICIENCY AND SPACE TECHNOLOGY
New Materials and Concepts for Cells

description: 28th European Photovoltaic Solar Energy Conference and Exhibition; 380-383
description: This work presents the results from the study of the properties of nano-structured ZnO deposited by the
electrochemical method on two types seeding multilayer conductive steak structures - ZnO:Al/Ag/ZnO:Al and
Ag/ZnO/Ag/ZnO, prepared by magnetron sputtering on glass substrate. The ZnO nano-structured films are deposited
using a three-electrode potentiostatic system. The influence of the deposition time on the optical and structural
properties of the obtained ZnO layers is performed by measurement of the optical transmittance, reflectance spectra
(specular and diffused) and by Scanning Electron Microscopy (SEM) and Atomic Force Microscopy (AFM),
respectively. The SEM micrographs and AFM pictures show that the ZnO films consist of nano-wiskers (NW) which
size depends on the deposition time. The nano-structures films have high value of diffused reflection of 18-30% (in
the case of seeding ZnO:Al/Ag/ZnO:Al structures) and of 30-70% (in the case of seeding Ag/ZnO:Al/Ag/ZnO:Al
structures) in the visible and NIR spectral range. The obtained nano-structured ZnO films can be applied as a rear
back electrode in deposited on them thin film solar cells with enhanced harvesting of the light.
Dipole excitation of surface plasmon on a conducting sheet: finite element approximation and validation
Creators: name: Maier, Matthias
name: Margetis, Dionisios
name: Luskin, Mitchell
Publisher: name: arXiv
Year: 2016
Subjects: subject: Numerical Analysis (math.NA)
subject: Mathematical Physics (math-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 65N30, 78M10, 78M30, 78A45

description: We formulate and validate a finite element approach to the propagation of a slowly decaying electromagnetic wave, called surface plasmon-polariton, excited along a conducting sheet, e.g., a single-layer graphene sheet, by an electric Hertzian dipole. By using a suitably rescaled form of time-harmonic Maxwell's equations, we derive a variational formulation that enables a direct numerical treatment of the associated class of boundary value problems by appropriate curl-conforming finite elements. The conducting sheet is modeled as an idealized hypersurface with an effective electric conductivity. The requisite weak discontinuity for the tangential magnetic field across the hypersurface can be incorporated naturally into the variational formulation. We carry out numerical simulations for an infinite sheet with constant isotropic conductivity embedded in two spatial dimensions; and validate our numerics against the closed-form exact solution obtained by the Fourier transform in the tangential coordinate. Numerical aspects of our treatment such as an absorbing perfectly matched layer, as well as local refinement and a-posteriori error control are discussed.
Qualitative and quantitative estimates for minimal hypersurfaces with bounded index and area
Creators: name: Buzano, Reto
name: Sharp, Ben
Publisher: name: arXiv
Year: 2015
Subjects: subject: Differential Geometry (math.DG)
subject: Analysis of PDEs (math.AP)
subject: Geometric Topology (math.GT)
subject: FOS: Mathematics

description: We prove qualitative estimates on the total curvature of closed minimal hypersurfaces in closed Riemannian manifolds in terms of their index and area, restricting to the case where the hypersurface has dimension less than seven. In particular, we prove that if we are given a sequence of closed minimal hypersurfaces of bounded area and index, the total curvature along the sequence is quantised in terms of the total curvature of some limit surface, plus a sum of total curvatures of complete properly embedded minimal hypersurfaces in Euclidean space - all of which are finite. Thus, we obtain qualitative control on the topology of minimal hypersurfaces in terms of index and area as a corollary.
description: 27 pages; v3: final version to be published in Trans. Amer. Math. Soc
Economic Comparison of Ground- and Space-Based Solar Power Systems
Creators: name: Inoue, T.
name: Yamada, K.
Publisher: name: WIP
Year: 2013
Subjects: PV SYSTEMS
PV System and Grid Integration Aspects

description: 28th European Photovoltaic Solar Energy Conference and Exhibition; 4301-4303
description: Ground-based solar power systems (GSPSs) using batteries or space-based solar power systems
(SSPSs) are expected to play roles as stable energy systems. However, there are many technical and economic
barriers that have to be overcome. To construct a viable scenario of a future solar power energy system, the
quantitative estimation of the heights of these barriers is necessary. To this end, we developed a bottom-up
methodology for performing quantitative technology scenario analyses. The methodology is based on the calculation
of the cost structure of the current and future energy systems. This study shows the weight and cost structures of
GSPSs and SSPSs. The total cost estimation of an SSPS includes the costs of transportation to and construction in
space. The costs of a GSPS and an SSPS are calculated to be 6 and 19 yen/kWh, respectively. The cost of an SSPS
corresponds to that of a GSPS with a battery system that has a PV storage capacity of 33 h. Herein, the cost of the
battery system is assumed to be 4 yen/Wh, which is calculated by our methodology. This type of quantitative
technology scenario is useful for assessing future energy systems.
Ground-state phases of the spin-1 $J_{1}$--$J_{2}$ Heisenberg antiferromagnet on the honeycomb lattice
Creators: name: Li, P. H. Y.
name: Bishop, R. F.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We study the zero-temperature quantum phase diagram of a spin-1 Heisenberg antiferromagnet on the honeycomb lattice with both nearest-neighbor exchange coupling $J_{1}>0$ and frustrating next-nearest-neighbor coupling $J_{2} \equiv κJ_{1} > 0$, using the coupled cluster method implemented to high orders of approximation, and based on model states with different forms of classical magnetic order. For each we calculate directly in the bulk thermodynamic limit both ground-state low-energy parameters (including the energy per spin, magnetic order parameter, spin stiffness coefficient, and zero-field uniform transverse magnetic susceptibility) and their generalized susceptibilities to various forms of valence-bond crystalline (VBC) order, as well as the energy gap to the lowest-lying spin-triplet excitation. In the range $0 < κ< 1$ we find evidence for four distinct phases. Two of these are quasiclassical phases with antiferromagnetic long-range order, one with 2-sublattice Néel order for $κ< κ_{c_{1}} = 0.250(5)$, and another with 4-sublattice Néel-II order for $κ> κ_{c_{2}} = 0.340(5)$. Two different paramagnetic phases are found to exist in the intermediate region. Over the range $κ_{c_{1}} < κ< κ^{i}_{c} = 0.305(5)$ we find a gapless phase with no discernible magnetic order, which is a strong candidate for being a quantum spin liquid, while over the range $κ^{i}_{c} < κ< κ_{c_{2}}$ we find a gapped phase, which is most likely a lattice nematic with staggered dimer VBC order that breaks the lattice rotational symmetry.
Growth Route Toward III-V Multispectral Solar Cells on Silicon
Creators: name: Renard, C.
name: Cherkashin, N.
name: Jaffré, A.
name: Molière, T.
name: Vincent, L.
name: Michel, A.
name: Alvarez, J.
name: Connolly, J.P.
name: Kleider, J.-P.
name: Mencaraglia, D.
name: Bouchier, D.
Publisher: name: WIP
Year: 2013
Subjects: MATERIAL STUDIES, NEW CONCEPTS, ULTRA-HIGH EFFICIENCY AND SPACE TECHNOLOGY
New Materials and Concepts for Cells

description: 28th European Photovoltaic Solar Energy Conference and Exhibition; 344-348
description: To date, high efficiency multijunction solar cells have been developed on Ge or GaAs substrates for
space applications, and terrestrial applications are hampered by high fabrication costs. In order to reduce this cost, we
propose a breakthrough technique of III-V compound heteroepitaxy on Si substrates without generation of defects
critical to PV applications. With this technique we expect to achieve perfect integration of heterogeneous Ga1-xInxAs
micro-crystals on Si substrates. In this paper, we show that this is the case for x=0. GaAs crystals were grown by
Epitaxial Lateral Overgrowth on Si (100) wafers covered with a thin SiO2 nanostructured layer. The cristallographic
structure of these crystals is analysed by MEB and TEM imaging. Micro-Raman and Micro-Photomuminescence
spectra of GaAs crystals grown with different conditions are compared with those of a reference GaAs wafer in order
to have more insight on eventual local strains and their cristallinity. This work aims at developping building blocks to
further develop a GaAs/Si tandem demonstrator with a potential conversion efficiency of 29.6% under AM1.5G
spectrum without concentration, as inferred from our realistic modeling. This paper shows that Epitaxial Lateral
Overgrowth has a very interesting potential to develop multijunction solar cells on silicon approaching the today
30.3% world record of a GaInP/GaAs tandem cell under the same illumination conditions, but on a costlier substrate
than silicon.
Development of Nano-Structured ‘Cu2-xS’ Film for Photovoltaic Applications
Creators: name: Mandal, R.
name: Das, D.
name: Ghosh, B.
Publisher: name: WIP
Year: 2013
Subjects: MATERIAL STUDIES, NEW CONCEPTS, ULTRA-HIGH EFFICIENCY AND SPACE TECHNOLOGY
New Materials and Concepts for Cells

description: 28th European Photovoltaic Solar Energy Conference and Exhibition; 384-386
description: The present paper consists of methodologies for the fabrication of nano-structured device grade Cu2-XS
films for PV applications. Cu2-XS films were prepared using co-evaporation, stacked elemental layer (SEL) deposition
and vacuum evaporation of prefabricated Cu2-XS granules. In co-evaporation both Cu and S sources were energized
simultaneously in high vacuum chamber. In SEL method, nano-structured Cu and S layer were deposited
simultaneously on the warm substrates and later on the total structure was annealed at elevated temperature for the
solid state reaction to form C2-XS layer. The Cu2-XS granules were prefabricated using uniform mixture of Cu and S
powerder and subsequent annealing in vacuum ambient. The structural, electrical and optical properties of the films
prepared by different methods have been studied for various processing conditions of films. The results indicated that
the films obtained by these methods having the indirect band gap in the range of 1.1 to 1.8 eV. Schottky diode was
fabricated using Cu as the counter metal partner. Results showed that method is promising one in fabrication of nanostructured
Cu2S films for PV applications
Elastically driven, intermittent microscopic dynamics in soft solids
Creators: name: Bouzid, Mehdi
name: Colombo, Jader
name: Barbosa, Lucas Vieira
name: Del Gado, Emanuela
Publisher: name: arXiv
Year: 2016
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: Soft solids with tunable mechanical response are at the core of new material technologies, but a crucial limit for applications is their progressive aging over time, which dramatically affects their functionalities. The generally accepted paradigm is that such aging is gradual and its origin is in slower than exponential microscopic dynamics, akin to the ones in supercooled liquids or glasses. Nevertheless, time- and space-resolved measurements have provided contrasting evidence: dynamics faster than exponential, intermittency, and abrupt structural changes. Here we use 3D computer simulations of a microscopic model to reveal that the timescales governing stress relaxation respectively through thermal fluctuations and elastic recovery are key for the aging dynamics. When thermal fluctuations are too weak, stress heterogeneities frozen-in upon solidification can still partially relax through elastically driven fluctuations. Such fluctuations are intermittent, because of strong correlations that persist over the timescale of experiments or simulations, leading to faster than exponential dynamics.
description: 7 pages, Supplementary Information included
Demonstration of weight-four parity measurements in the surface code architecture
Creators: name: Takita, Maika
name: Córcoles, A. D.
name: Magesan, Easwar
name: Abdo, Baleegh
name: Brink, Markus
name: Cross, Andrew
name: Chow, Jerry M.
name: Gambetta, Jay M.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We present parity measurements on a five-qubit lattice with connectivity amenable to the surface code quantum error correction architecture. Using all-microwave controls of superconducting qubits coupled via resonators, we encode the parities of four data qubit states in either the $X$- or the $Z$-basis. Given the connectivity of the lattice, we perform full characterization of the static $Z$-interactions within the set of five qubits, as well as dynamical $Z$-interactions brought along by single- and two-qubit microwave drives. The parity measurements are significantly improved by modifying the microwave two-qubit gates to dynamically remove non-ideal $Z$ errors.
description: 8 pages, 4 figures
Non-linear uplift Ansätze for the internal metric and the four-form field-strength of maximal supergravity
Creators: name: Krüger, Olaf
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The uplift of SO(8) gauged N=8 supergravity to 11-dimensional supergravity is well studied in the literature. It is given by consistent relations between the respective vector and scalar fields of both theories. For example, recent work provided non-linear uplift Ansätze for the scalar degrees of freedom on the internal manifold: the inverse metric and the three-form flux with mixed index structure. However, one always found the metric of the compactified manifold by inverting the inverse metric --- a task that was only possible in particular cases, e.g. for the G$_2$, SO(3)$\times$SO(3) or SU(3)$\times$U(1)$\times$U(1) invariant solutions of 11-dimensional supergravity. In this paper, I present a direct non-linear uplift Ansatz for the internal metric in terms of the four-dimensional scalars and the Killing forms on the compactified background manifold. Based on this formula, I also find new uplift Ansätze for the warp factor and the full three-form flux. Finally, I provide a direct non-linear uplift Ansatz for the internal four-form field-strength in terms of the metric, the flux as well as the four-dimensional scalars and background Killing forms. This new formula does not require to calculate the derivative of the flux. My results may be generalized to other compactifications, e.g. the reduction from type IIB supergravity to five dimensions.
description: 18pages
Spin Hall Effect and Origins of Nonlocal Resistance in Adatom-Decorated Graphene
Creators: name: Van Tuan, Dinh
name: Marmolejo-Tejada, J. M.
name: Waintal, Xavier
name: Nikolic, Branislav K.
name: Roche, Stephan
Publisher: name: arXiv
Year: 2016
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Recent experiments reporting unexpectedly large spin Hall effect (SHE) in graphene decorated with adatoms have raised a fierce controversy. We apply numerically exact Kubo and Landauer- Buttiker formulas to realistic models of gold-decorated disordered graphene (including adatom clustering) to obtain the spin Hall conductivity and spin Hall angle, as well as the nonlocal resistance as a quantity accessible to experiments. Large spin Hall angles of 0.1 are obtained at zero-temperature, but their dependence on adatom clustering differs from the predictions of semiclassical transport theories. Furthermore, we find multiple background contributions to the nonlocal resistance, some of which are unrelated to SHE or any other spin-dependent origin, as well as a strong suppression of SHE at room temperature. This motivates us to design a multiterminal graphene geometry which suppresses these background contributions and could, therefore, quantify the upper limit for spin current generation in two-dimensional materials.
description: Computational resources from PRACE and the Barcelona Supercomputing Center (Mare Nostrum), under Project 2015133194 acknowledged
Conducting Transparent Polymers as Luminescent Down-Shifting Layers for Solar Cells
Creators: name: Chebotareva, A.B.
name: Untila, G.G.
name: Kost, T.N.
name: Lachinov, A.N.
name: Ostakhov, S.S.
name: Antipin, V.A.
name: Salazkin, S.N.
name: Shaposhnikova, V.V.
Publisher: name: WIP
Year: 2013
Subjects: MATERIAL STUDIES, NEW CONCEPTS, ULTRA-HIGH EFFICIENCY AND SPACE TECHNOLOGY
New Materials and Concepts for Cells

description: 28th European Photovoltaic Solar Energy Conference and Exhibition; 361-364
description: Transparent wide-band polymers polyarylenesterketones (PAEK) were used to attach current
collecting grid of wire to antireflection TCO (Transparent Conducting Oxide) layer on silicon solar cell surface in
Laminated Grid Solar Cell (LGCell) construction. Pressure-induced transition from dielectric into a highconductivity
state in thin polymer layer appears after low temperature lamination step. The polymer layer provides
good cross conductivity, but having dielectric properties in the longitudinal direction. The application of polymers in
LGCell design ensures the excellent adhesion of wire to TCO and allows the use the round wire, improving the
conversion parameters due to the reduced effective width of fingers.
In the present work the PAEK films were doped by lanthanide Eu(III) complex to provide luminescent down-shifting
(LDS) improving the poor spectral response of solar cells to short-wavelength light. The purpose of the work was to
create doped polymer films with good separation between the absorption and emission bands and having high
luminescence quantum efficiency for LDS, but retaining good optical and contact properties for the use in the
LGCell contact system. The optimized concentration of Eu(fod)3 complex in the PAEK film provides large Stokes
shift: excitation wavelengths are within the range of 300 ÷ 380 nm, corresponding to the absorption region of the
composite, and the photoluminescence emission spectrum lies within the range of 550 ÷ 720 nm. Simultaneously,
doped polymer films ensure low contact resistivities (<1 mΩ·cm2) in TCO film/doped polymer film/metal system.
Net Energy Balance and Smart Grids in Spain: Integration with PV Systems
Creators: name: De Simón-Martín, M.
name: Díez-Mediavilla, M.
name: Alonso-Tristán, C.
Publisher: name: WIP
Year: 2013
Subjects: PV SYSTEMS
PV System and Grid Integration Aspects

description: 28th European Photovoltaic Solar Energy Conference and Exhibition; 4240-4243
description: In this paper, main configurations and technical regulations in Spain about Net Energy Balance
Systems and Smart Grids are presented. This short of installations is quite interesting for the future developments of
Green Energy Sources, especially photovoltaic ones. The main benefits are the reduction of power losses in the
distribution system, optimization of the energy resources and better monitoring of power supply and energy demand.
Smart Grids and Net Energy Balance Systems are the newest trends in electrical energy generation and distribution.
Its benefits are widely demonstrated and they contribute to reduce the CO2 emissions to the atmosphere and increase
the efficiency rates. The lack of public support for PV energy generation makes looking for new points of view
mandatory. Without feed in tariff policies, huge photovoltaic plants are not attractive nowadays. We should focus on
small systems implemented in Smart Grids and supported with Net Energy Balance strategies. This is another way to
support Green Energy Generation and it has great benefits for domestic users.
Letter from Douglass William Montgomery to William Elliot Griffis, September 10, 1921
Creators: name: Montgomery, Douglass W. (Douglass William)
Publisher: name: No Publisher Supplied
Year: 1921

description: Confirms that Griffis' letter was given to Mr. George C. Sargent. Recommends Griffis to contact Hobart Baling, song of George C. Sargent for more information.
Triangulated Matlis equivalence
Creators: name: Positselski, Leonid
Publisher: name: arXiv
Year: 2016
Subjects: subject: Category Theory (math.CT)
subject: Commutative Algebra (math.AC)
subject: FOS: Mathematics

description: This paper is a sequel to arXiv:1503.05523 and arXiv:1605.03934. We extend the classical Harrison-Matlis module category equivalences to a triangulated equivalence between the derived categories of the abelian categories of torsion modules and contramodules over a Matlis domain. This generalizes to the case of any commutative ring $R$ with a fixed multiplicative system $S$ such that the $R$-module $S^{-1}R$ has projective dimension $1$. The latter equivalence connects complexes of $R$-modules with $S$-torsion and $S$-contramodule cohomology modules. It takes a nicer form of an equivalence between the derived categories of abelian categories when $S$ consists of nonzero-divisors or the $S$-torsion in $R$ is bounded.
description: LaTeX 2e with pb-diagram and xy-pic, 41 pages, 5 commutative diagrams; v.2: additions throughout the text, new section 3 inserted, section 7 added, several references added; v.3: several references added, several misprints corrected; v.4: the beginning of section 1 rewritten, new Lemma 1.8 inserted, Remarks 4.7 and 6.8 added, several references added; v.5: several misprints corrected
High Penetration of Photovoltaic Systems in a Residential District: An Innovative Project for the Decentralized Management of Distributed Energy Generation
Creators: name: Rivola, D.
name: Marzoli, M.
name: Chianese, D.
name: Rudel, R.
Publisher: name: WIP
Year: 2013
Subjects: PV SYSTEMS
PV System and Grid Integration Aspects

description: 28th European Photovoltaic Solar Energy Conference and Exhibition; 4256-4260
description: The high penetration of PV systems in a residential district reduces the use of fossil fuels, emission of
CO2 and pollutants and energy losses, but requires a fine-tuned management of the grid. Within the Swiss2Grid
(S2G) pilot project, 20 private households in the same district have been equipped with smart PV energy production
units. The installations have been provided with high quality monitoring systems, in time match with monitoring
devices installed in the distribution grid and the LV transformer. The collected data are used to support the
development of an algorithm for the decentralized management of households loads. The results of the preliminary
measurements campaign are presented before applying the algorithm.
Some conceptual issues in loop quantum cosmology
Creators: name: Barrau, Aurélien
name: Bolliet, Boris
Publisher: name: arXiv
Year: 2016
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Loop quantum gravity is a mature theory. To proceed to explicit calculations in cosmology, it is necessary to make assumptions and simplifications based on the symmetries of the cosmological setting. Symmetry reduction is especially critical when dealing with cosmological perturbations. The present article reviews several approaches to the problem of building a consistent formalism that describes the dynamics of perturbations on a quantum spacetime and tries to address their respective strengths and weaknesses. We also review the main open issues in loop quantum cosmology.
description: Invited article for an IJMP volume dedicated to loop quantum gravity
A Low-Cost Power-Smoothing Solution to Mitigate PV Intermittency
Creators: name: Brandhorst Jr., H.W.
name: Skumanich, A.
Publisher: name: WIP
Year: 2013
Subjects: PV SYSTEMS
PV System and Grid Integration Aspects

description: 28th European Photovoltaic Solar Energy Conference and Exhibition; 4244-4247
description: A significant issue for PV is the intermittency of solar production which limits the level of PV
penetration due to rapid variability. Batteries are expensive and best for periods >60 minutes. There is a key need for
shorter time power smoothing on the order of seconds to 60 minutes. Any solution in solar must meet three
conditions: (1) very low cost (2) robust technology (3) reliable over 20 years. This Power Smoothing Solution
addresses those requirements in the minutes time scale and allows for re-capture of otherwise lost kiloWatt-hr power
generation. The solution provides voltage output smoothing which can dramatically improve grid-connectivity and
allows for expanded PV grid penetration. Currently because of intermittency and lack of predictable dispatchability,
the general levels of PV penetration are limited at <20%, at least in the USA. The solution enables greater penetration
and consequently greater PV market size. The architecture of supercapacitors is employed where the effective
dielectric constant is magnified >1000x by using novel polarization materials. The paper presents both technical and
cost aspects. This approach can also mitigate costs in tandem with batteries or grid spinning reserves. Finally, this
approach can augment the adoption of PV beyond current forecasts.
A New Micro-Grid Concept by Using PV Panels with Integrated Storage Super-Capacitor
Creators: name: Righetti, A.
name: Grasso, G.
name: Accetta, G.
name: Della Giustina, D.
Publisher: name: WIP
Year: 2013
Subjects: PV SYSTEMS
PV System and Grid Integration Aspects

description: 28th European Photovoltaic Solar Energy Conference and Exhibition; 4266-4268
description: The large increase in the electrical power provided by photovoltaic plant is generating problem in a
distribution network that is not designed for distributed and intermittent power suppliers. In this paper we propose
the use of micro-grid connecting local customers and local distributed photovoltaic power generators based on
panels with integrated storage capability using super-capacitors and controlled by an intelligent local node that
maximize the in-site use of the produced energy. The local node communicates with a secondary substation node (ssnode)
managing the exchange of energy based on the level of stored energy, the needs of the grid and the needs of
customers -. This approach is aimed at giving a more efficient use of the produced energy and a reduced power
exchange within the low voltage distribution grid.
Closed expression for the pair vibrational correlation energy of a uniform distribution of single-nucleon levels
Creators: name: Neergård, K.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: A closed expression is derived for the pair vibrational correlation energy generated in the random phase approximation by the isovector pairing force in the case when Kramers and charge degenerate single-nucleon levels are uniformly distributed in an interval. The expression is used to analyze the spectral density of pair vibrational frequencies relative to that of two-quasinucleon energies. Applications to the analysis of the symmetry energy of the isovector pairing model and to a Strutinskij renormalization of this model are discussed.
Optoelectrical Properties of Graphene Oxide/Silver Nanoparticles Composite Layers
Creators: name: Chuchmała, A.
name: Palewicz, M.
name: Granek, F.
Publisher: name: WIP
Year: 2013
Subjects: MATERIAL STUDIES, NEW CONCEPTS, ULTRA-HIGH EFFICIENCY AND SPACE TECHNOLOGY
New Materials and Concepts for Cells

description: 28th European Photovoltaic Solar Energy Conference and Exhibition; 336-339
description: The properties of graphene oxide (GO) – silver nanoparticles (Ag NPs) composite films prepared by
wet-chemical processing were investigated. The focus of the study is the development of the printable transparent
conductive electrode for the flexible organic solar cell, as an alternative to the costly and brittle indium-tin oxide
(ITO) layers. Optical properties of the investigated GO:AgNPs composite layers points out that the increase in
concentration of silver nanoparticles improves the transmittance. Moreover, addition of silver nanoparticles have
positive effect on the sheet resistance of obtained layers, however only up to certain value of silver concentration
(20—30 vol%), after which the reverse effect is observed. This effect can be explained by the agglomeration of the
AgNPs in the suspension.. This study presents initial results. In order to obtain better optoelectrical properties further
studies regarding optimization of fabrication process are needed.
Decoherence of the quantum logic gate implemented with the Jaynes-Cummings model: A semiclassical approach
Creators: name: Azuma, Hiroo
Publisher: name: arXiv
Year: 2016
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: In this paper, we investigate decoherence of Knill, Laflamme, and Milburn's nonlinear sign-shift gate that is implemented with the Jaynes-Cummings model. Introducing a stochastic variable as an external electric field, we let it couple with a dipole moment of a two-level atom. We examine this model using a semiclassical theory. Results of the Monte Carlo simulations under the semiclassical approximation correspond well with those obtained with the quantum mechanical perturbation theory for the stochastic process. In the results of the simulations, we observe both the $\mbox{T}_{1}$ and $\mbox{T}_{2}$ decays. This paper is a sequel to the reference [H.~Azuma, Prog. Theor. Phys. {\bf 126}, 369 (2011)].
description: v1: 29 pages, 19 eps figures, latex2e; v2: 25 pages, 13 eps figures, vastly revised, the title is changed, Section 6 and Appendix B in the previous version are removed; v3: typographical errors corrected
Integrating Diffractive Rear Side Structures for Light Trapping into Crystalline Sillicon Solar Cells
Creators: name: Eisenlohr, J.
name: Hauser, H.
name: Benick, J.
name: Mellor, A.
name: Bläsi, B.
name: Goldschmidt, J.C.
name: Hermle, M.
Publisher: name: WIP
Year: 2013
Subjects: MATERIAL STUDIES, NEW CONCEPTS, ULTRA-HIGH EFFICIENCY AND SPACE TECHNOLOGY
New Materials and Concepts for Cells

description: 28th European Photovoltaic Solar Energy Conference and Exhibition; 297-302
description: Diffractive rear side light trapping structures significantly enhance the path length for near infrared light. We present
a way of integrating such diffractive rear side structures into crystalline silicon solar cells. Two types of diffractive
structures, hexagonal sphere gratings and binary gratings have been simulated and fabricated. For both structures
absorption enhancements corresponding to a photo current density gain of 1-2 mA/cm2 have been verified in optical
measurements. To integrate these diffractive structures into fully processed silicon solar cells, we developed a
passivation concept using a thin Al2O3 layer that provides a high-quality passivation for the rear side of the active
silicon bulk and has a negligible influence on the optical properties. We also present a planarization process that
prevents parasitic absorption in the rear side metal layer.
Thermophotovoltaic Efficiency Enhancement through Metamaterial Selective Emitters
Creators: name: Pfiester, N.A.
name: DeMeo, D.
name: Shemelya, C.M.
name: Vandervelde, T.E.
Publisher: name: WIP
Year: 2013
Subjects: MATERIAL STUDIES, NEW CONCEPTS, ULTRA-HIGH EFFICIENCY AND SPACE TECHNOLOGY
New Materials and Concepts for Cells

description: 28th European Photovoltaic Solar Energy Conference and Exhibition; 269-273
description: Applying thermophotovoltaics (TPV) to present energy production technologies allows us to increase energy output while utilizing existing infrastructure by reclaiming the heat lost during the production process. In order to maximize the efficiency of these sources, the conversion efficiency of the TPV system needs to be optimized. Using metamaterials, we have created selective emitters that tailor the incident light spectrum to the band gap of specific diodes, offering the potential to reduce diode heating and increase efficiency. Usage of metals such as platinum and molybdenum makes the emitters able to withstand the high temperatures required to create ideal spectra for III-V cells. Simulations from CST Microwave Studio were used in the design process and testing of the emitters includes heat tests and SEM analysis.
A Stein characterisation of the generalized hyperbolic distribution
Creators: name: Gaunt, Robert E.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Probability (math.PR)
subject: FOS: Mathematics
subject: 60F05, 60E05

description: The generalized hyperbolic (GH) distributions form a five parameter family of probability distributions that includes many standard distributions as special or limiting cases, such as the generalized inverse Gaussian distribution, Student's $t$-distribution and the variance-gamma distribution, and thus the normal, gamma and Laplace distributions. In this paper, we consider the GH distribution in the context of Stein's method. In particular, we obtain a Stein characterisation of the GH distribution that leads to a Stein equation for the GH distribution. This Stein equation reduces to the Stein equations from the current literature for the aforementioned distributions that arise as limiting cases of the GH superclass.
description: 19 pages, to appear in ESAIM: Probability and Statistics, 2017+
Increase of Internal Quantum Efficiency due to Carrier Multiplication in Silicon Solar Cells
Creators: name: Hosatte, M.
name: Basta, M.
name: Kuznicki, Z.T.
Publisher: name: WIP
Year: 2013
Subjects: MATERIAL STUDIES, NEW CONCEPTS, ULTRA-HIGH EFFICIENCY AND SPACE TECHNOLOGY
New Materials and Concepts for Cells

description: 28th European Photovoltaic Solar Energy Conference and Exhibition; 292-296
description: Intense research effort is nowadays being deployed towards nanostucturing, due to its potential of
significant improvement of PV conversion efficiency. Nanostructures are usually based on chemical composition
variations, but they can also be created by sharp interfaces between crystalline and amorphous parts of the same
material. Thanks to innovative fabrication techniques, such nanostructures were embedded into all-silicon solar cells
whose half of the surface was covered with an electronic surface passivation made of SiO2. Contrary to classical solar
cells, the internal quantum efficiency was higher for the parts of the cells remained unprotected from surface
recombination. For each test device, the increase reached about 30% for a broad part of the spectrum centered at 500
nm. These experimental results confirmed previous data obtained by comparison of samples. Nanostructured test
devices showed a new carrier multiplication mechanism, similar to what is observed in quantum dot solar cells, where
the nanostructures modify the physical properties of the material and can enhance Auger generation of carriers.
Interactive Visual Simulation for Photovoltaic Design and Planning in the Built Environment
Creators: name: Lingfors, D.
name: Widén, J.
name: Seipel, S.
Publisher: name: WIP
Year: 2013
Subjects: PV SYSTEMS
PV System and Grid Integration Aspects

description: 28th European Photovoltaic Solar Energy Conference and Exhibition; 4176-4179
description: The PV penetration in the power system is rapidly increasing today, due to a drop in PV system prices and
growing concern of global warming. It is therefore important to be able to simulate the solar energy yield with high
temporal and spatial resolution in order to enable city planners and distribution network operators to find optimal ways to
integrate PV in urban environments. Most tools presently available for solar energy analyses are performed either for a
momentarily snapshot in time, or integrated over a whole year. A conceptual method for simulating and visualizing the
solar irradiance in real-time has been developed by utilizing texture processing capabilities of graphical processing units
(GPU). Each variable (solar vectors, occlusion, cloudiness, irradiance etc.) needed for simulating the solar irradiance on
any arbitrary surface is saved as a 2D texture map, representing time of the day and day of the year. The first results are
promising, showing that an entire set of 3-min solar irradiance data over a whole year can be calculated in real-time and
visualized as the user moves a cursor over any arbitrary surface (Figure 4). However, the occlusion calculation is the
most complex and is yet to be implemented. Furthermore, electrical energy consumption data as well as solar forecasting
algorithms could be integrated in the model.
New Concept of Hot Carrier Solar Cells
Creators: name: Konovalov, I.
Publisher: name: WIP
Year: 2013
Subjects: MATERIAL STUDIES, NEW CONCEPTS, ULTRA-HIGH EFFICIENCY AND SPACE TECHNOLOGY
New Materials and Concepts for Cells

description: 28th European Photovoltaic Solar Energy Conference and Exhibition; 263-265
description: Although the original idea of hot carrier solar cell was proposed more than 30 years ago, no efficient implementation was developed so far. The probable reason for this is that the original concept puts requirements of fine energy filtering, which are attractive in theory, but not realistic in praxis. A new concept is proposed, able to utilize some of the energy of hot carriers and thus able to overcome the Shockley-Queisser limit. It is based on double heterojunction structure with specially tuned band offsets.
Gaussian continuum basis functions for calculating high-harmonic generation spectra
Creators: name: Coccia, Emanuele
name: Mussard, Bastien
name: Labeye, Marie
name: Caillat, Jérémie
name: Taïeb, Richard
name: Toulouse, Julien
name: Luppi, Eleonora
Publisher: name: arXiv
Year: 2016
Subjects: subject: Computational Physics (physics.comp-ph)
subject: Atomic Physics (physics.atom-ph)
subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: We explore the computation of high-harmonic generation spectra by means of Gaussian basis sets in approaches propagating the time-dependent Schr{ö}dinger equation. We investigate the efficiency of Gaussian functions specifically designed for the description of the continuum proposed by Kaufmann et al. [J. Phys. B 22, 2223 (1989)]. We assess the range of applicability of this approach by studying the hydrogen atom, i.e. the simplest atom for which "exact" calculations on a grid can be performed. We notably study the effect of increasing the basis set cardinal number, the number of diffuse basis functions, and the number of Gaussian pseudo-continuum basis functions for various laser parameters. Our results show that the latter significantly improve the description of the low-lying continuum states, and provide a satisfactory agreement with grid calculationsfor laser wavelengths $λ$0 = 800 and 1064 nm. The Kaufmann continuum functions therefore appear as a promising way of constructing Gaussian basis sets for studying molecular electron dynamics in strong laser fields using time-dependent quantum-chemistry approaches.
Study on DC Supply of Photovoltaic to Air-Conditioner at Plant Factory
Creators: name: Otosaka, A.
name: Takayama, S.
name: Ishigame, A.
name: Ino, T.
name: Otsuka, K.
Publisher: name: WIP
Year: 2013
Subjects: PV SYSTEMS
PV System and Grid Integration Aspects

description: 28th European Photovoltaic Solar Energy Conference and Exhibition; 4180-4183
description: In Japan, energy problem is aggravated by the nuclear power plant disaster caused by the Great East
Japan Earthquake in March 11, 2011. For this reason, electricity consumption is limited in to the time during heavy
power demand (ex. Summer). To solve this problem, recently, installation of natural energy (ex. PV) and efficient
supply of energy are needed. PV output is direct current (DC).In general, PV output is converted to alternate current
(AC) to interconnect the power system. However, conversion loss is increased by the AC conversion. That is, DC
power system is able to supply the PV output efficiently. The authors have experimented with DC power system
consisting of PV panel, air conditioner and DC/DC converter. In this paper, the result of the experiment and consider
difference of system efficiency wave is discussed.
Effects of Flicker in a Distribution Grid with High PV Penetration
Creators: name: Spring, A.
name: Wirth, G.
name: Becker, G.
name: Pardatscher, R.
name: Witzmann, R.
name: Brantl, J.
name: Schmidt, S.
Publisher: name: WIP
Year: 2013
Subjects: PV SYSTEMS
PV System and Grid Integration Aspects

description: 28th European Photovoltaic Solar Energy Conference and Exhibition; 4184-4189
description: The quantity of installed photovoltaic (PV) systems in the German distribution grid is still increasing. In some
areas the installed PV capacity exceeds 5 kWp [SPR-13] per house connection (HC). Therefore the load flow changes its
characteristics and leads to new requirements for the grid. In some areas the power feedback is higher than the delivery and
the installed PV capacity becomes the decisive factor for grid planning. This paper discusses the impact of PV systems on the
flicker level. The focus hereby is on the correlation between the flicker level and the grid voltage and the meteorological
parameters. Different approaches to investigate if there is an influence of PV systems on the flicker are taken into account.
Furthermore an investigation if the normative limit is exceeded will be shown.
The modular group and words in its two generators
Creators: name: Alkauskas, Giedrius
Publisher: name: arXiv
Year: 2015
Subjects: subject: Number Theory (math.NT)
subject: Combinatorics (math.CO)
subject: Group Theory (math.GR)
subject: FOS: Mathematics
subject: 05A05, 05A15, 20XX, 14H05

description: Consider the full modular group $\sf{PSL}_{2}(\mathbb{Z})$ with presentation $\langle U,S|U^3,S^2\rangle$. Motivated by our investigations on quasi-modular forms and the Minkowski question mark function (so that this paper might be considered as a necessary appendix), we are lead to the following natural question. Some words in the alphabet $\{U,S\}$ are equal to the unity; for example, $USU^3SU^2$ is such a word of length $8$, and $USU^3SUSU^3S^3U$ is such a word of length $15$. Given $n\in\mathbb{N}_{0}$. Find the number of words of length $n$ which are equal to the unity. This is the new entry A265434 into the Online Encyclopedia of Integer Sequences. We investigate the generating function of this sequence and prove that it is an algebraic function over $\mathbb{Q}(x)$ of degree $3$. As an aside, we formulate the problem of describing all algebraic functions with a Fermat property.
description: 13 pages, 1 figure. Final version before proofs. A subsection on algebraic functions with a Fermat property was expanded
Optimization of Antireflective Submicron Gratings Integrated AlInP Window Layer for High Efficiency Compound Semiconductor Based Solar Cells
Creators: name: Yeo, C.I.
name: Kang, S.J.
name: Kim, J.B.
name: Lee, Y.T.
Publisher: name: WIP
Year: 2013
Subjects: MATERIAL STUDIES, NEW CONCEPTS, ULTRA-HIGH EFFICIENCY AND SPACE TECHNOLOGY
New Materials and Concepts for Cells

description: 28th European Photovoltaic Solar Energy Conference and Exhibition; 266-268
description: We optimized the submicron gratings (SMGs) integrated AlInP window layer for enhancing the efficiency of compound semiconductor based solar cells by using a rigorous coupled wave analysis method and a Silvaco ATLAS device simulator. To optimize the AlInP window layer, solar-weighted reflectance (SWR) and cell efficiency of GaAs single junction (SJ) solar cells were calculated. The calculated SWR and cell efficiency were strongly correlated with the geometric parameters of SMGs, including period, height, and diameter-to-period ratio, as well as initial thickness of AlInP window layer. It should be noted that the optimum cell efficiency was obtained not using a point having the lowest SWR value, but using a point determined by both the antireflection property and effective volume of AlInP window layer because the light absorbed by AlInP window cannot contribute to electrical energy output. The GaAs SJ solar cell with optimum SMGs integrated AlInP window layer exhibited an efficiency of 20.5%, which is 22% improved efficiency compared to the flat surface (16.7%) with an equal effective thickness of AlInP. This result is so promising for achieving high-efficiency compound semiconductor based solar cells.
An Economic Evaluation of Two Alternative Layout Planning Concepts for Photovoltaic Power Plants
Creators: name: Schüle, I.
name: Plociennik, K.
name: Ewe, H.
name: Bischoff, M.
Publisher: name: WIP
Year: 2013
Subjects: PV SYSTEMS
PV System and Grid Integration Aspects

description: 28th European Photovoltaic Solar Energy Conference and Exhibition; 4143-4147
description: We evaluate the economic efficiencies of two well-known planning concepts for large-scale, groundmounted
photovoltaic power plants. The individual layout planning concept is based on individually placing PV
tables on the land area, while the block planning concept is based on repeatedly placing pre-designed blocks, i.e.,
groups of one or more inverters with assigned tables arranged in a regular layout pattern. The advantage of the
individual planning concept is that the available land area can be utilized to its full potential, whereas the block
planning concept typically yields lower building costs due to a more regular plant design.
Depending on the land area and project-specific goals, the layout planners have to weigh up which of the two
planning concepts is superior. By using realistic case studies with economic efficiency calculations, we show that the
superior planning concept cannot be identified on first sight, since both concepts have advantages and drawbacks of
their own, strongly depending on the shape and topography of the land area and further influences.
Simulation of Hydrogen Production System by Using Solar PV Energy
Creators: name: Ghribi, D.
name: Achaibou, N.
name: Diaf, S.
name: Amrouche, B.
Publisher: name: WIP
Year: 2013
Subjects: MATERIAL STUDIES, NEW CONCEPTS, ULTRA-HIGH EFFICIENCY AND SPACE TECHNOLOGY
Fundamental Material Studies

description: 28th European Photovoltaic Solar Energy Conference and Exhibition; 237-241
description: Hydrogen fuel can be produced by using solar electric energy from photovoltaic (PV) modules for the electrolysis of water without emitting carbon dioxide or requiring fossil fuels. In this paper, an assessment of the technical potential for producing hydrogen from the PV/proton exchange membrane (PEM) electrolyser system is investigated. The present study estimates the amount of hydrogen produced by this system in four locations using hourly global solar irradiations on horizontal plane and ambient temperature. The system studied in this work is composed of 120 W PV module connected with 2 units of commercial h-tec 50W StaXX7 PEM electrolyser connected in series in order to obtain a load of 100W. Two configurations of connection are considered (PV module - DC/DC converter equipped with MPPT- Pem electrolyser) and (PV module - Pem electrolyser). The simulation results obtained are relative to the sites of Algiers, Adrar, Ghardaia and Tamanrasset.