bluuebunny/crossref_metadata_2025_split huggingface dataset:
Conditions for the identical distribution of free carriers in thin films
Authors: Zaytseva E G , Naumova O V , Gutakovskii A K 
Published: October 2021

Abstract
The condition of the same distribution of free carriers in thin films is necessary for comparing the mobility and analyzing the scattering mechanisms of carriers near semiconductor film/insulator interfaces. In thin film/insulator systems with different design parameters, it is difficult to ensure the same distribution of free carriers due to physical phenomenon such as the coupling effect. In this study, TCAD simulations of thin-film transistors, which have been used to monitor Si film properties, were applied to find parameters that allow tuning the potential distribution and, accordingly, the distribution of free carriers in films. It was found that such parameters are the film regime, the density of induced carriers, the gate voltage or threshold voltage of transistors. The conditions for the selection of parameters were found that ensure the same distribution of free carriers in thin-film structures for the cases of different thicknesses of films and the surrounding dielectrics. It was shown that the proposed approach can be used for a comparative analysis of the mobility in thin films and makes it possible to eliminate errors associated with different distributions of carriers in the films due to the coupling effect.
Flat band of Kagome lattice in graphene plasmonic crystals
Authors: Zhuo Liqiang , He Huiru , Huang Ruimin , Li Zhi , Qiu Weibin , Zhuang Fengjiang , Su Shaojian , Lin Zhili , Huang Beiju , Kan Qiang 
Published: October 2021

Abstract
We propose graphene plasmonic crystals (GPCs) with a Kagome lattice, and investigate the properties of the flat band (FB) in the plasmonic system. By modulating the arrangement of the chemical potentials, a FB is obtained. Furthermore, the authenticity of the FB is confirmed by comparing the band structures and the eigen field distributions obtained from using the tight-binding modeled Hamiltonian with numerical calculations. The proposed Kagome-type GPCs could be of great significance for the study of novel effects in strong interaction systems in the field of plasmonics.
Temperature dependence and functionalization of solution processed high-k hybrid gate insulators for high performance oxide thin-film transistors
Authors: Bermundo Juan Paolo S , Kesorn Ployrung , Yoshida Naofumi , Safaruddin Aimi Syairah , Uraoka Yukiharu 
Published: October 2021

Abstract
We demonstrate a solution processed gate insulator (GI) with high dielectric constant (high-k) of up to ∼8.9 for high performance and low voltage operation amorphous InGaZnO (a-IGZO) thin-film transistors (TFTs). High mobilities of up to ∼30 cm2 V s−1, threshold voltage of <0.5 V, and low off current (∼10−12 A) can be achieved through the combination of high-k BaTiO
x
(BTO) nanoparticles and a polysiloxane (PSX) polymer matrix. This combination enables a lower process temperature of 300 °C from 650 °C while ensuring enhanced performance and low gate leakage current. We also show the tunability of the high-k hybrid BTO/PSX through fluorination and addition of a photosensitive property to further reduce the leakage current and inhibit dry etching related degradation. High-k hybrid BTO/PSX GI is a promising candidate for high performance and low-voltage operation oxide TFTs.
Enhancement in thermoelectric properties of n-type (La0.7Sr0.3MnO3)0.5.(NiO)0.5: composite and nano-structure effect
Authors: Singh Saurabh , Kumar Srivastav Simant , Patel Ashutosh , Kumar Ashish , Chatterjee Ratnamala , Takeuchi Tsunehiro , Pandey Sudhir K 
Published: October 2021

Abstract
In the enhancement of thermoelectric properties of material for energy harvesting applications, the role of nano-composite made of two different materials plays a very crucial role. When materials with different crystal and electronic structure are synthesized in nano-crystalline phase to form a composite, they provide large power factor via energy filtering effect, whereas the lattice mismatching and grain boundaries of two phase scatter the phonons having wide range of frequencies, and effectively maintain the low thermal conductivity. In the present work, we have reported the structural and thermoelectric properties of (La0.7Sr0.3MnO3)0.5(NiO)0.5 composite synthesized by sol-gel method. Rietveld refinement of the XRD pattern confirms the presence of both phases. Thermoelectric properties are measured in 300–600 K temperature range. The magnitude of Seebeck coefficients, electrical resistivity, and thermal conductivity found to be monotonically increase with temperature upto the ∼450 K, which decrease gradually with further increase in temperature. Such variation in transport properties are resulted from the combine effect from the composite materials formed with semiconducting/metallic, and insulating electronic structure mixed in a 50:50 weight ratio. The calculated ‘figure-of-merit’ (ZT) shows an increasing trend with temperature. The value of ZT

max

is found to be ∼0.05 at 600 K, which is nearly three times larger than that of La0.7Sr0.3MnO3 (ZT = 0.013) reported earlier. Our strategy of making nano-composite two materials with different electronic structures enhanced the ZT by ∼285%. The improvement in thermoelectric properties of n-type oxide materials can be useful to consider this material for applications in mid-temperature range.
First-principles study of pressure-induced phase transitions, mechanical and thermodynamic properties of ThBC
Authors: Sun Jiacheng , Liao Zhiguang , Zhang Yue , Guo Yongliang , Ke Xuezhi 
Published: October 2021

Abstract
First-principles calculations and particle swarm optimization algorithm are combined to predict the crystal structures in the pressure range from 0 to 100 GPa. Four phases of ThBC are determined, including the P4122, Cmcm, Cmce and Immm phases, in which the Cmcm, Cmce and Immm phases are newly predicted structures. The mechanical, electronic and thermodynamic properties of the four phases are investigated. According to the enthalpy–pressure and volume–pressure curves, the phase transition pressure from the P4122 phase to the Cmcm phase is 15 GPa, the Cmcm to the Cmce is 36 GPa and the Cmce to the Immm is 69 GPa. All the transitions belong to the first-order phase transition. Based on the calculated elastic constants, the P4122, Cmcm, Cmce and Immm phases exhibit brittle nature. The Young’s moduli show that the P4122 phase has the largest degree of anisotropy, and the Immm phase has the smallest. The calculated density of states reveal that the P4122, Cmcm, Cmce and Immm phases are all metallic.
The performance of surface enhanced Raman scattering and spatial resolution with triangular plate dimer from ultra-ultraviolet to near-infrared range
Authors: Wei Yong , Pei Huan , Yan Baoxin , Zhu Yanying 
Published: October 2021

Abstract
The theoretical research on surface enhanced Raman spectroscopy (SERS) of triangular plate dimer (TPD) is of great significance for the design of experimental substrates. In this paper, the SERS properties of the TPD with Au, Ag, Al and Cu have been theoretical investigated in the ultra-ultraviolet, visible and near-infrared region. The influence of the TPD configuration, including the tip radian, the dimer distance and the aspect ratio on the electric field, Raman enhancement and spatial resolution are studied by the finite element method. The results show that there are dipole resonance band and quadruple dipole resonance band in the surface plasmon resonance band of TPD. The tip radian and dimer distance play the dominant role in the electric field enhancement, and the aspect ratio can be mainly used to tune the peak position of the electric field. The smaller tip radian and dimer distance will produce a stronger localized electric field and a small red shift of the peak position. Adjusting the aspect ratio can tune the position of electric field peak from ultraviolet (UV) to near-infrared without changing the peak value of the electric field significantly, especially for Al TPD. The maximum Raman enhancement factor of Au, Ag and Cu all reach 11 orders of magnitude, and 9 orders of magnitude for Al. The spatial resolution changes linearly with the gap distance, and the maximum spatial distributions of Au, Ag, Al and Cu achieve 0.65 nm, 0.67 nm, 0.69 nm and 0.70 nm with the dimer distance of 1 nm. Our results not only provide a better theoretical guidance for the optimization of TPD substrates in the SERS experiment, but also extend its application scope from ultra-UV to near-infrared range.
A novel fault diagnosis scheme for rolling bearing based on symbolic aggregate approximation and convolutional neural network with channel attention
Authors: Wang Bo , Ning Yi , Zhang Yahu 
Published: October 2021

Abstract
Benefitting from the rapid development of artificial intelligence, the end-to-end fault diagnosis mode based on deep learning has become one of the most potential research directions. Nevertheless, regardless of the outstanding diagnostic accuracy, this kind of diagnostic procedure still faces the problems of high-dimensional data redundancy and subjective feature extraction. To overcome the above limitations, a novel fault diagnosis scheme for rolling bearings based on symbolic aggregate approximation (SAX) and a convolutional neural network with attention mechanism is developed in this work. In the developed diagnosis procedure, the raw data are first symbolized by the SAX approach, which can effectively reduce the dimensions of the data with relatively low subjectivity according to the characteristics of the original waveform. In addition, to enhance the feature abstraction ability of the model, channel-based attention is introduced into the deep architecture. The character strings generated by the SAX are fed into the attention mechanism-enhanced deep model to implement the training procedure, which significantly improves the diagnosis efficiency. The proposed method is tested on the common bearing fault data set of Western Reserve University, and the fault classification accuracy reaches 98.4%, with good fault diagnosis performance. The effectiveness of the proposed method is verified by comparing it with existing fault classification methods.
Studies on transmittance modulation and ions transfer kinetic based on capacitive-controlled 2D V2O5 inverse opal film for electrochromic energy storage application
Authors: Zhao Lili , Kuang Junwei , Zhuang Weifeng , Chao Jie , Liao Wenbo , Fu Xiaobo , Li Chao , Ye Lingyun , Liu Hailu 
Published: October 2021

Abstract
Two-dimensional vanadium pentoxide inverse opal (2D V2O5 IO) architecture was fabricated by polystyrene (PS) sphere template assisted electrodeposition process. In comparison to the un-templated V2O5 film, the 2D V2O5 IO film exhibited a highly ordered hexagonal close-packed bowel-like array, as well as noticeable electrochromism, such as transmittance modulation up to 42.6% at 800 nm, high coloration efficiency (28.6 cm2 · C−1), fast ions transfer kinetic (t
b = 7.2 s, t
c = 2.5 s). These improvements of electrochromic performance were attributed to the ordered morphology with larger surface areas, which considerably shortened the ions diffusion paths and accelerated ions migration. An electrochromic energy storage device assembled from the 2D V2O5 IO film with simultaneous electrochromic and pseudocapacitive performance could not only show transmittance modulation accompanied by multicolor variations but also powered an LCD screen and an LED bulb, demonstrating a promising potential for practical applications.
Existence and rigidity of the vectorial Peierls–Nabarro model for dislocations in high dimensions
Authors: Gao Yuan , Liu Jian-Guo , Liu Zibu 
Published: October 2021

Abstract
We focus on the existence and rigidity problems of the vectorial Peierls–Nabarro (PN) model for dislocations. Under the assumption that the misfit potential on the slip plane only depends on the shear displacement along the Burgers vector, a reduced non-local scalar Ginzburg–Landau equation with an anisotropic positive (if Poisson ratio belongs to (−1/2, 1/3)) singular kernel is derived on the slip plane. We first prove that minimizers of the PN energy for this reduced scalar problem exist. Starting from H
1/2 regularity, we prove that these minimizers are smooth 1D profiles only depending on the shear direction, monotonically and uniformly converge to two stable states at far fields in the direction of the Burgers vector. Then a De Giorgi-type conjecture of single-variable symmetry for both minimizers and layer solutions is established. As a direct corollary, minimizers and layer solutions are unique up to translations. The proof of this De Giorgi-type conjecture relies on a delicate spectral analysis which is especially powerful for nonlocal pseudo-differential operators with strong maximal principle. All these results hold in any dimension since we work on the domain periodic in the transverse directions of the slip plane. The physical interpretation of this rigidity result is that the equilibrium dislocation on the slip plane only admits shear displacements and is a strictly monotonic 1D profile provided exclusive dependence of the misfit potential on the shear displacement.
Instability in large bounded domains—branched versus unbranched resonances
Authors: Avery Montie , Dedina Cedric , Smith Aislinn , Scheel Arnd 
Published: October 2021

Abstract
We study transitions from convective to absolute instability near a trivial state in large bounded domains for prototypical model problems in the presence of transport and negative nonlinear feedback. We identify two generic scenarios, depending on the nature of the linear mechanism for instability, which both lead to different, universal bifurcation diagrams. In the first, classical case of a linear branched resonance the transition is hard, that is, small changes in a control parameter lead to a finite-size state. In the second, novel case of an unbranched resonance, the transition is gradual. In both cases, the bifurcation diagram is determined by interaction of the leading edge of an invasion front with upstream boundary conditions. Technically, we analyze this interaction in a heteroclinic gluing bifurcation analysis that uses geometric desingularization of the trivial state.
Simulation of transport in the FT-2 tokamak up to the electron scale with GENE
Authors: Janhunen Salomon , Merlo Gabriele , Gurchenko Alexey , Gusakov Evgeniy , Jenko Frank , Kiviniemi Timo 
Published: October 2021

Abstract
Prior experimental work on the FT-2 tokamak has observed electron density fluctuations at electron Larmor radius scales using the enhanced scattering (ES) diagnostic (Gusakov et al 2006 Plasma Phys. Control. Fusion
48 A371–6, Gurchenko and Gusakov 2010 Plasma Phys. Control. Fusion
52 124035). Gyrokinetic GENE simulations of conditions at the upper hybrid resonance layer probed by the ES diagnostic show the presence of the anticipated turbulence from the electron temperature gradient (ETG) driven instability in linear and nonlinear simulations. Ion-scale turbulence is responsible for majority of the transport via trapped electron modes, while impurities act to merge the spectrum of the ion and the electron scale instabilities into a continuum. The linear spectrum at electron scales is characterized by maximal growth rate at a significant ballooning angle θ
0, and at ion scales the turbulence is broad in the ballooning angle distribution. The neoclassical shearing rate obtained from GENE breaks symmetry in nonlinear simulations of ETG turbulence, which manifests itself as an asymmetric turbulence spectrum. The electron density fluctuation spectrum obtained with GENE corresponds well to the ES measurement at electron scales, as do the fluxes obtained from the ion-scale simulations.
Localization of five-dimensional Elko spinors on dS/AdS thick branes *
Authors: Zhou Xiang-Nan , Du Yun-Zhi , Ma Xin-Yuan , Zhao Zhen-Hua 
Published: October 2021

Abstract
Owing to the special structure of a five-dimensional Elko spinor, its localization on a brane with codimension one becomes completely different from that of a Dirac spinor. By introducing the coupling between the Elko spinor and the scalar field that can generate the brane, we have two types of localization mechanism for the five-dimensional Elko spinor zero mode on a brane. One is the Yukawa-type coupling, and the other is the non-minimal coupling. In this study, we investigate the localization of the Elko zero mode on de Sitter and Anti-de Sitter thick branes with the two localization mechanisms, respectively. The results show that both the mechanisms can achieve localization. The forms of the scalar coupling function in both localization mechanisms have similar properties, and they play a similar role in localization.
Kotzinian-Mulders effect in semi-inclusive DIS within TMD factorization *
Authors: Luo Xuan , Sun Hao 
Published: October 2021

Abstract
In this study, we investigate the Kotzinian-Mulders effect under semi-inclusive deep inelastic scattering (SIDIS) within the framework of transverse momentum dependent (TMD) factorization. The asymmetry is contributed by the convolution of the Kotzinian-Mulders function

and the unpolarized fragmentation function

. As a TMD distribution, the Kotzinian-Mulders function in the coordinate space in the perturbative region can be represented as the convolution of the C-coefficients and the corresponding collinear correlation function. The Wandzura-Wilczek approximation is used to obtain this correlation function. We perform a detailed phenomenological numerical analysis of the Kotzinian-Mulders effect in the SIDIS process within TMD factorization at the kinematics of the HERMES and COMPASS experiments. We observe that the obtained

-,

-, and

-dependent Kotzinian-Mulders effects are basically consistent with the HERMES and COMPASS measurements. We also make predictions at EIC and EicC kinematics.
What Can We Learn from the Geoeffectiveness of the Magnetic Cloud on 2012 July 15–17?
Authors: Liu Gui-Ang , Zhao Ming-Xian , Le Gui-Ming , Mao Tian 
Published: October 2021

Abstract
An interplanetary shock and a magnetic cloud (MC) reached the Earth on 2012 July 14 and 15 one after another. The shock sheath and the MC triggered an intense geomagnetic storm. We find that only small part of the MC from 06:45 UT to 10:05 UT on 2012 July 15 made contribution to the intense geomagnetic storm, while the rest part of the MC made no contribution to the intense geomagnetic storm. The averaged southward component of interplanetary magnetic field (B

s
) and duskward-electric fields (E

y
) within the MC from 10:05 UT, 2012 July 15 to 09:08 UT, 2012 July 16 (hereafter MC_2), are 15.11 nT and 8.01 mV m−1, respectively. According to the empirical formula established by Burton et al. (hereafter Burton equation), the geoeffectiveness of MC_2 should be −655.42 nT, while the geoeffectiveness of MC_2 is −324.68 nT according to the empirical formula established by O’Brien & McPherron (hereafter OM equation). However, the real geoeffectiveness of MC_2 is 39.74 nT. The results indicate that the Burton equation and the OM equation cannot work effectively. The geoeffectiveness of MC_2 shows that large and long duration of B

s
or E

y
cannot guarantee the occurrence of an intense geomagnetic storm if the solar wind dynamic pressure is very low. If we use 0.52 as γ, the geoeffectiveness of MC_2 is 40.36 nT according to the empirical formula established by Wang et al., which is very close to the observed value, indicating that the empirical formula established by Wang et al. is much better than the Burton equation and the OM equation.
Preparation of superhydrophobic electrospun MWCNT-SiO2/PVDF composite membranes for oil adsorption
Authors: Jiang Li-Wang , Liu Yi-Wang , Hu Qing-Di , Zeng Feng-Tao , Yang Yong-Yu , Lan Xin , Chen Song-Yun , Lin Bo , He Fu-An 
Published: October 2021

Abstract
In this work, an useful way to fabricate the superhydrophobic electrospun multi-walled carbon nanotube (MWCNT)-SiO2/polyvinylidene fluoride (PVDF) composite membranes for the oil adsorption was developed. First, the SiO2 nanoparticles were prepared using the Stöber method followed by the modification with the trimethoxy (1H, 1H, 2H, 2H-heptadecafluorodecyl) silane (TMHFDS). Next, the nanofibrous MWCNT-SiO2/PVDF composite membranes were prepared by the electrospinning technique and then immersed into the TMHFDS solution to lower its surface energy. Furthermore, the structure of the TMHFDS-modified MWCNTs-SiO2/PVDF composite membranes were studied by the scanning electron microscope, the Fourier-transform infrared, the wide-angle x-ray diffraction, and the measurement results of the wetting property showed that the TMHFDS-modified MWCNTs-SiO2/PVDF composite membranes could be superhydrophobic with the highest water contact angle of 155°. The resultant TMHFDS-modified MWCNT-SiO2/PVDF composite membranes were able to absorb different oils with the adsorption capacities ranging from 4.2 g g−1 to7.2 g g−1.
Impact of spark plasma sintering process on tribo surface of Al/CNT composites
Authors: P Manikandan , A Elayaperumal , R Franklin Issac , R Vijay , G Padmanabham 
Published: October 2021

Abstract
Spark Plasma Sintered Aluminium (SPSed Al) composites are widely used in various micro components of the engineering applications. This paper deals with the evaluation of tribological behavior of the SPSed Al composites with respect to the SPS process parameters. The multi-walled Carbon Nano Tubes (CNTs) are added to the SPSed Al composites to improve its wear resistance by a solid lubrication effect. The presence and distribution of CNT over the Al matrix are confirmed through the FESEM analysis and the crystallographic changes of the SPSed Al/CNT composites are examined using the XRD analysis. The hardness of the SPSed Al/CNT composite has been improved by the re-crystallization at the optimal SPS condition. It also influences the frictional wear behavior of the Al/CNT composites and it resulted in overcome of ploughing on the Al surface. The frictional wear behavior of the SPSed Al/CNT composites is optimized using the taguchi methodology and the minimum wear rate of 24.7 × 10–6 g m−1 and the CoF of 0.192 are obtained for the Al/CNT1 wt% composite sintered at 500 °C and ball milled at 300 rpm for 480 min. The worn surface of the Al/CNT1 wt% composite reveals that the mild abrasive wear is occurred at the optimal tribo condition.
Recovery of Te for the scrap of Bi2Te3-based alloys by vacuum metallurgy
Authors: Kong Dong , Chen Dingya , Kuang Zhixiang , Xu Chenhui , Feng Bo , Hu Xiaoming , Chen Zhuo , Ma Yan , Fan Xi’ an , Li Guangqiang , Li Yawei 
Published: October 2021

Abstract
Every year a large amount of scrap can be produced from the Bi2Te3-based alloys when processing. A clean, new vacuum distillation method is proposed to purify Te from the scrap of Bi2Te3-based alloys. In this work, the saturated vapor pressure, distillation rate and separation coefficient of each metal element in Bi2Te3-based alloys are theoretically analyzed. The effects of distillation temperature and time on the volatilization and condensation behavior of elements are studied under the dynamic vacuum of 0.1 Pa. According to the research results, a multi-stage distillation method is proposed, and Te was purified from 41.53% to 98.88% while the total impurity content was reduced to 1.12% through this procedure. Moreover, Te of the scrap of Bi2Te3-based alloys can be separated and recovered effectively via this three-step vacuum distillation. The results lay the foundation for the industrial purification of Te and provide a low-cost, simple and green recycling process of thermoelectric scrap, which has important practical significance.