bluuebunny/crossref_metadata_2025_split huggingface dataset:
Ionization of an atom with different initial angular momenta in an intense circular polarized laser field
Authors: Wu Dan , Guo Fu-Ming , Chen Ji-Gen , Wang Jun , Yang Yu-Jun 
Published: October 2020

Abstract
We theoretically investigate the ionization process of the interaction between a strong circular polarized laser pulse and an atom, whose initial state has different orbital angular momenta. When the rotation direction of the laser vector field is opposite to that of the bound state, the ionization probability is significantly higher than the co-rotating case, in which the laser vector field is in the rotational direction of the bound electron. Especially, with the increase of the incident laser’s wavelength, the ionization probability is enhanced for the co-rotating case, and it is on the contrary in the counter-rotating case. By analyzing electronic trajectories in both cases, it is demonstrated that, the difference of variations of the ionization probability with the laser’s wavelength can be attributed to that of durations from the electron passing through the exit of the over-the-barrier potential, which is formed by the atom potential and the laser field.
Effects of finite momentum width on the reversal dynamics in a BEC based atom optics δ-kicked rotor
Authors: Mangaonkar Jay , Vishwakarma Chetan , Maurya S Sagar , Sarkar Sumit , MacLennan Jamie L , Dutta Pranab , Rapol Umakant D 
Published: October 2020

Abstract
This experimental work demonstrates the importance of finite-width effects in the evolution of a quantum system, where the results deviate considerably from the plane wave approximation even for an initial state with a very narrow momentum width i.e a Bose–Einstein condensate. The system under consideration is an atom optics δ-kicked rotor for which a fidelity based measurement has been proposed to possess a rapid scaling of sensitivity (N
−3) with pulse number N. Although attractive, we demonstrate that this scaling does not hold in the regime where the momentum selectivity of the pulse sequence becomes significantly smaller than the momentum width of the initial state. Additionally, the momentum distribution post kicking shows a lattice-phase dependent intra-order and inter-order asymmetry in the diffracted orders. The intra-order asymmetry, in which no net momentum current is present, is a previously unreported type of effect. For a two pulse case, the inter-order asymmetry signal is found to be about five times more sensitive to the resonance than the initial state fidelity. Both of these asymmetries provide a zero-crossing signal which can be used to diagnose any undesirable lattice phase offset at resonant and off-resonant pulse periods.
Colossal permittivity due to electron trapping behaviors at the edge of double Schottky barrier
Authors: Wu Kangning , Wang Yao , Hou Zongke , Li Shengtao , Li Jianying , Tang Zhuang , Lin Ying 
Published: October 2020

Abstract
Achieving frequency- and temperature-independent colossal permittivity (CP) with low dielectric loss is a long-standing challenge for electronic materials, in which the basic issue is understanding the underlying relaxation mechanism. In this paper, taking CaCu3Ti4O12 ceramics as an example, CP was ascribed to electron-trapping behaviors at the edge of a double Schottky barrier (DSB). On the one hand, the widely reported origins of CP, i.e. Maxwell–Wagner relaxation and polaronic relaxation, were identified as two aspects of the same bulk conductivity. This caused the insights derived from the commonly employed impedance and admittance spectra to be revisited. On the other hand, hysteresis between CP and external voltages at low temperatures, which was caused by electron filling of interface states, was predicted and experimentally confirmed. This further supported the proposal that CP arose from electron trapping at the DSB. Moreover, multiple relaxations were foreseen when more than one kind of point defect existed in the depletion layers of a DSB. The establishment of intense ‘effective’ relaxation, which was related to shallow traps, was indispensable for achieving CP, while ‘redundant’ relaxation was induced by deep-level defects, resulting in relatively high dielectric loss. Therefore, proper manipulation of the DSB and its related defect structures was crucial for achieving stable CP with sufficiently low dielectric loss.
Mapping the structural, magnetic and electronic behavior of (Eu1−
x
Ca
x
)2Ir2O7 across a metal–insulator transition
Authors: Zoghlin Eli , Porter Zach , Britner Samuel , Husremovic Samra , Choi Yongseong , Haskel Daniel , Laurita Geneva , Wilson Stephen D 
Published: October 2020

Abstract
In this study, we employ bulk electronic properties characterization and x-ray scattering/spectroscopy techniques to map the structural, magnetic and electronic properties of (Eu1−x
Ca
x
)2Ir2O7 as a function of Ca-doping. As expected, the metal-insulator transition temperature, T
MIT, decreases with Ca-doping until a metallic state is realized down to 2 K. In contrast, T
AFM becomes decoupled from the MIT and (likely short-range) AFM order persists into the metallic regime. This decoupling is understood as a result of the onset of an electronically phase separated state, the occurrence of which seemingly depends on both synthesis method and rare earth site magnetism. PDF analysis suggests that electronic phase separation occurs without accompanying chemical phase segregation or changes in the short-range crystallographic symmetry while synchrotron x-ray diffraction confirms that there is no change in the long-range crystallographic symmetry. X-ray absorption measurements confirm the J
eff = ½ character of (Eu1−x
Ca
x
)2Ir2O7. Surprisingly these measurements also indicate a net electron doping, rather than the expected hole doping, indicating a compensatory mechanism. Lastly, XMCD measurements show a weak Ir magnetic polarization that is largely unaffected by Ca-doping. Keywords: term, term, term.
Quantification of low affinity binding interactions between natural killer cell inhibitory receptors and targeting ligands with a self-induced back-action actuated nanopore electrophoresis (SANE) sensor
Authors: Peri Sai Santosh Sasank , Sabnani Manoj Kumar , Raza Muhammad Usman , Urquhart Elizabeth L , Ghaffari Soroush , Lee Jung Soo , Kim Min Jun , Weidanz Jon , Alexandrakis George 
Published: October 2020

AbstractA plasmonic nanopore sensor enabling detection of bimodal optical and electrical molecular signatures was fabricated and tested for its ability to characterize low affinity ligand-receptor interactions. This plasmonic nanosensor uses self-induced back-action (SIBA) for optical trapping to enable SIBA-actuated nanopore electrophoresis (SANE) through a nanopore located immediately below the optical trap volume. A natural killer (NK) cell inhibitory receptor heterodimer molecule CD94/NKG2A was synthesized to target a specific peptide-presenting Qa-1bQdm ligand as a simplified model of low-affinity interactions between immune cells and peptide-presenting cancer cells that occurs during cancer immunotherapy. A cancer-irrelevant Qa-1bGroEL ligand was also targeted by the same receptor as a control experiment to test for non-specific binding. The analysis of different pairs of bimodal SANE sensor signatures enabled discrimination of ligand, receptor and their complexes and enabled differentiating between specific and non-specific ligand interactions. We were able to detect ligand-receptor complex binding at concentrations over 500 times lower than the free solution equilibrium binding constant (KD). Additionally, SANE sensor measurements enabled estimation of the fast dissociation rate (koff) for this low-affinity specific ligand-receptor system, previously shown to be challenging to quantify with commercial technologies. Thekoffvalue of targeted peptide-presenting ligands is known to correlate with the subsequent activation of immune cellsin vivo, suggesting the potential utility of the SANE senor as a screening tool in cancer immunotherapy.
Preparation and characterization of SnO films via reactive sputtering for ambipolar thin-film transistor applications
Authors: Huo Jingyong , Wang Xiaolin , Wu Xiaohan , Liu Wen-Jun , Ding Shi-Jin 
Published: October 2020

Abstract
SnO films are prepared by reactive magnetron sputtering under various O2 partial pressures along with post-annealing in air. The results indicate that the O2 partial pressure during reactive sputtering process not only influences the composition of the SnO film but also its texture. For the SnO film deposited under 10% O2 partial pressure, its direct bandgap increases from 2.49 to 2.64 eV with elevating the post-annealing temperature from 250 °C to 400 °C. The above SnO-based channel thin-film transistors (TFTs) exhibit a typical ambipolar feature after post-annealing at ≥250 °C in air. For the TFTs annealed at 300 °C for 30 min, the extracted hole and electron field-effect mobility is 1.48 cm2V−1s−1 and 0.21 cm2V−1s−1, respectively. The performance of both p- and n-type TFTs could be further improved by optimizing fabrication process and post-annealing conditions because of a trade-off between hole and electron mobility.
Impact of depolarization electric-field and charge trapping on the coercive voltage of an Si:HfO2-based ferroelectric capacitor
Authors: Jung Taehwan , Shin Jaemin , Shin Changhwan 
Published: October 2020

Abstract
The shift of coercive voltage (V
c) during cycling is investigated on ferroelectric (FE) silicon-doped hafnium oxide thin films with different (i) Si concentrations in HfO2, (ii) thickness of the ferroelectric layer (T
FE), and (iii) thickness of the interface layer (T
IL). We find that the depolarization field (E
dep) and charge trapping are two major root-causes for the shift of coercive voltage. The increased remanent polarization (P
r) with cycling of up to 105 causes a strong E
dep, which leads to a higher voltage for polarization switching. On the other hand, the trapped charge improves the charge compensation, and then it suppresses the V
c shift due to E
dep: in the case of Si doping content, TFE, and TIL, the difference in the magnitude of Vc increases by 4.5%, 0.5% and 3% while the difference in E
dep increases by 5%, 8% and 15%, respectively. To investigate the rate of charge trapping, the defect band energy level is extracted by two-state NMP theory incorporated into a ‘Comphy’ tool. These results suggest that the strategy discussed above is a promising approach to designing FE-HfO2 devices.
Logical gates embedding in artificial spin ice
Authors: Caravelli Francesco , Nisoli Cristiano 
Published: October 2020

Abstract
The realization and study of arrays of interacting magnetic nanoislands, such as artificial spin ices, have reached mature levels of control that allow design and demonstration of exotic, collective behaviors not seen in natural materials. Advances in the direct manipulation of their local, binary moments also suggest a use as nanopatterned, interacting memory media, for computation within a magnetic memory. Recent experimental work has demonstrated the possibility of building logic gates from clusters of interacting magnetic domains, and yet the possibility of large scale integration of such gates can prove problematic even at the theoretical level. Here we introduce theoretically complete sets of logical gates, in principle realizable in an experiment, and we study the feasibility of their integration into tree-like circuits. By evaluating the fidelity control parameter between their collective behavior and their expected logic functionality we determine conditions for integration. Also, we test our numerical results against the presence of disorder in the couplings, showing that the design gate structure is robust to small coupling perturbations, and thus possibly to small imperfections in the fabrication of the islands.
Circularly polarized coherent light-induced boosting of polymer solar cells photovoltaic performance
Authors: Zhang Longlong , Hao Yuying , Qin Wei , Xie Shijie , Qu Fanyao 
Published: October 2020

Abstract
We report a microscopic quantum theory which can be used to study circularly polarized light (CPL) induced singlet to triplet conversions in polymer solar cells (PSCs). We demonstrate that by properly adjusting CPL irradiation parameters, the photo-created singlet excitons can be efficiently converted into non radiative triplet excitons. The maximum singlet–triplet conversion ratio might be reached when the incident CPL frequency is chosen in such a way that the resonant optical excitation occurs between singlet and triplet states. In addition, we also illustrate that with varying CPL oscillating strength, the singlet–triplet conversion patterns behave as the Rabi oscillations and the steadily maintained triplet excitons. The electron-lattice coupling leads to the self-trapping of the excitons, which enhances the coherence between the electron’s and hole’s spin oscillations. This study opens up a novel approach for enhancing and controlling the photovoltaic response of PSCs by an effective all-optical route.
Uncovering the release mechanism of nucleotide import by HIV-1 capsid
Authors: Song Guang 
Published: October 2020

Abstract
Efficient nucleotide import is critical to fuel the reverse DNA synthesis that takes place within the HIV-1 capsid. However, the mechanism by which the HIV-1 capsid imports nucleotides is presently unclear. In this work, we carry out a series of Brownian diffusion simulations to elucidate the nucleotide import process through the hexamer pores of the HIV-1 capsid. Our simulations reveal a significant role of the electrostatic field in the import process and the mechanism by which deoxynucleoside triphosphates (dNTPs) diffuse through the arginine ring: specifically, how IP6s and ATPs, though competing with dNTPs for binding at the pore of the arginine ring, end up accelerating the dNTP import rate by thousands of folds so that it is sufficiently high to fuel the encapsidated DNA synthesis.
A complex Neural Classifier for the Fault Prognosis and Diagnosis of Overhead Electrical Lines
Authors: Belardi R , Bindi M , Grasso F , Luchetta A , Manetti S , Piccirilli M C 
Published: October 2020

Abstract
The technique proposed in this work is finalized to the non-intrusive monitoring of high voltage electrical networks. In order to develop a prognostic method capable of avoiding failures on overhead transmission grids, the connection joints between two sections of the line are considered. The method is based on the use of Frequency Response Analysis (FRA) and machine learning, represented by a neural classifier based on a Multi-Valued Neuron (MVN) neural network. The procedure can be considered as a smart measurement block, where a single measure is used by a neural classifier to extract information able to diagnose an electrical system. This means that the method shown in this paper can be developed and adapted to solve many different problems in the world of industry, such as the management of the most worn electrical devices. In this sense, the maintenance organization plays a fundamental role and the prognostic approach allows the reduction of the recovery times by locating critical components. This monitoring system increases the global availability of the electrical grid in which it is used and, from a practical point of view, it can be used by network operators to obtain online control of operating conditions.
Impact of the Seventh Harmonic Magnitude for an Optimal Control of Five-phase PMSM
Authors: Dieng A 
Published: October 2020

Abstract
In this paper, the impact of the seventh harmonic magnitude for an optimal torque control of 5-phase PMSM is studied. We showed that the machine evolved in two orthogonal frames and can be decomposed into two fictitious machines called respectively main machine, secondary machine. As the two frames are fully decoupled, the torque control of each fictitious machine is done separately. the goal is to maximize the average torque, to minimize the copper losses and to reduce the torque ripples. The main machine is not impacted but in the secondary machine, it is possible to know the variation of the torque ripples and the copper losses by modifying the imposed current references and taking into account the seventh harmonic of the EMF. An itemized analysis of the impact of the EMF seventh harmonic magnitude is done. Simulation results highlight the performances of the torque control strategy under using a robust controller.
Economic Verification of Hybrid Energy Utilizations with HOMER Pro
Authors: Gu Zhengwei , Zhou Yangping 
Published: October 2020

Abstract
This study gives emphasis to the economic analysis of hybrid Energy systems which are gradually paid attention by researchers worldwide as a new way to cope with climate change and sustainable development. The economic cost is an important feature that restricts the development of hybrid energy system. The purpose of this study is to verify the economic characteristics of hybrid energy system with HOMER Pro software. Firstly, the economic characteristics of different single energy sources are investigated. Secondly, the economic performances of different hybrid energy systems are analyzed and compared. The research results show that our simulations based on HOMER Pro software have good agreement with those in reference cases. In the future, a unified economy evaluation will be carried out for these hybrid energy utilizations.
Choosing rational locations for placing wind farms in Eurasia with regard to the railway transport specifics
Authors: Dmitrenko A V , Lesnykh E V , Bekher S A , Dmitrenko I Y , Buryanina N S 
Published: October 2020

Abstract
On the continent of Eurasia, there is a main point of excess energy resources - a cargo point located on the territory of Western Siberia in Kuzbass. From it, both west and east, excess flows of energy resources are transmitted in the form of electricity or transported in the form of coal over long distances by rail. Electricity is an environmentally cleaner form of energy resources, since it does not pollute the environment. Therefore, in modern conditions, it is necessary to use electricity to a greater extent. There is the possibility of replacing energy-intensive technological operations: from wood and coal, as well as oil and gas to electric energy. This will be possible and advisable to be carried out in new points during the additional construction of production enterprises for the generation of electricity, as well as when replacing existing technical equipment from previously existing fuel sources with electric energy. The generation of electricity from renewable sources becomes appropriate. The placement of wind farms in both the western and eastern parts of the Eurasia continent will make it possible to reduce the transmission distance of electric power from a cargo point by 5 thousand km.
Calculating model allowing to keep the authenticity of transport infrastructure objects
Authors: Loktev Daniil , Korolev Vadim , Tkachenko Vladimir , Klekovkina Nadezhda 
Published: October 2020

Abstract
In this work, a calculation model of the building is proposed, which is an object of historical and cultural heritage, which allows, on the one hand, reconstructing the building taking into account the changed operating conditions and regulatory loads according to all the rules of the construction mechanics of the structure, and on the other hand, maintaining the authenticity of the main architectural and decorative elements. The proposed engineering solutions allow for the collaboration of new and historical structural elements, combining the possibility of using modern materials in new structural elements and authentic materials in elements whose historical authenticity is preserved. In the calculation model, it is proposed to use two layers of finite elements, which are responsible for new and historical structural elements, and then ensure the compatibility of their work using special conditions.
Organizational and technological decisions in the construction of transport infrastructure facilities
Authors: Sokolnikov V , Osipenkova I , Stupakova O , Nurgalina R 
Published: October 2020

Abstract
In recent years, the technology of design and construction of buildings has changed significantly both in terms of applied structural solutions, and in terms of the use of construction machines, mechanisms, equipment. The recent significant qualitative leap in the development of methods and ways of organizing the implementation of individual technological processes and their complexes requires an improvement in the methodological approach to the adoption of organizational and technological decisions as part of the documentation developed during the design and construction of facilities.
Optimization of the construction project in complex geomechanical conditions
Authors: Komolov Vasilii , Simankina Tatyana , Kuzmin Konstantin , Kuzmina Tatyana 
Published: October 2020

Abstract
The purpose of the study is to optimize the construction project of a residential complex. The paper considers the mechanism for optimizing the construction of a residential building and a quarterly road network. The study was carried out in several stages and includes the breakdown of the complex into specialized types of work, the preparation of matrices of work volumes, the calculation of construction duration, the calculation of methods for organizing work in different order, and the calculation of the estimated cost of objects. The calculation and selection of the work organization method was carried out by the method of continuous use of resources, continuous development of work fronts and the critical path method. Next, statistical modeling of the deviation of the project duration from the planned value was performed in the Microsoft Project software package. The first step was to perform a regression analysis. The second step is a correlation analysis, which allowed us to determine the degree of reliability of the project. The third step is to analyze the effectiveness of the project. In conclusion, a conclusion is made regarding the relevance of the unified estimated standards for this project.
Conceptual framework for solving problems of commercial transportation of goods in the city logistics system
Authors: Rudskaia Elena , Eremenko Igor 
Published: October 2020

Abstract
The aim of the study is to develop conceptual provisions and operational recommendations for the development of urban transport logistics on a public-private partnership basis. Theoretical studies were carried out using methods of analysis and synthesis of existing scientific developments in the field of territorial management of logistics centers, distribution sites and terminals at the municipal level. At the end of the study the following results were obtained: - the necessity to change the format of transport and logistics services for urban economic relations is proven; - the efficiency to establish a city network of interceptive logistics sites for trucking on the principles of public-private partnership is justified, parameters for choosing locations for such logistics facilities are developed and their attributes are formulated; - recommendations on advanced transport management on the basis of the municipal digital centre with the aim of increasing the efficiency of the urban transport system with environmental protection were proposed.