We consider the effects of anisotropic coherency strain (due to lattice mismatch) on phase separation in intercalation materials, motivated by the high-rate Li-ion battery material \fepo. Using a phase-field model coupled to elastic stresses, we analyze spinodal decomposition (linear instability of the homogeneous state) as well as nonlinear evolution of the phase pattern at constant mean filling. We consider fully anisotropic coherency strain and focus on the novel case of simultaneous expansion and contraction along different crystal axis, as in the case of \fepo, which leads to tilted, striped phase boundaries in equilibrium.
Eutectic and peritectic equilibria in coherent binary alloys
Department of Materials Science and Engineering, University of Arizona(亚利桑那大学材料科学与工程系);Graduate Interdisciplinary Program in Applied Mathematics, University of Arizona(亚利桑那大学应用数学跨学科研究生项目)
Influence of strain on anisotropic thermoelectric transport of Bi$_2$Te$_3$ and Sb$_2$Te$_3$
基于详细的第一性原理计算和半经典Boltzmann输运理论,研究了应变下Bi $_2$ Te $_3$和Sb $_2$ Te $_3$的各向异性热电输运性质.发现由于应变相关的热电势和电导率的补偿效应,Bi $_2$ Te $_3, while being stable for Sb$ _2 $Te$ _3 $. A clear preference for thermoelectric transport under hole-doping, as well as for the in-plane transport direction was found for both tellurides. In contrast to the electrical conductivity anisotropy, the anisotropy of the thermopower was almost robust under applied strain. The assumption of an anisotropic relaxation time for Bi$ _2 $Te$ _3在面内应变下,相关的功率因数将降低。这表明,在单晶系统中,强的各向异性散射效应已经起作用。
Chemo-mechanical coupling stabilizes mixed $\mathrm{Ag}_{x}\mathrm{Cu}_{1-x}\mathrm{GaSe}_{2}$ solar-cell absorbers: Insights from Monte-Carlo simulations assisted by ab initio informed machine-learning potentials
Institute of Materials Science, Technische Universitat Darmstadt(达姆施塔特工业大学材料科学研究所)
Unusual anisotropic response of the charge carrier mobility to uniaxial mechanical strain in Rubrene crystals
本文系统地研究了Rubrene单晶在单轴机械应变下的电荷输运,在平行或垂直于电流方向的拉伸和压缩应变下,在晶体的两个面内输运方向上。陷阱态密度保持不变。场效应迁移率作为分子间输运的基准数据,发现随着压缩应变而增加,反之亦然,其幅度为-1.5 cm 2/Vs/ %应变,与输运方向无关。一个非常显著的结果是当晶体垂直于输运方向应变时迁移率的变化。虽然这种增强可以从改进的波函数重叠定量地解释,但垂直方向上的流动性提高得更多,这与基于后期扩展和通常的泊松比的简单几何考虑相反。这一结果强调了有机分子晶体中应力引起的动力学波函数重叠变化的中心作用。
Anisotropic Strain Engineering in La0.7Sr0.3MnO3/LaFeO3 Superlattice: Structural Relaxation and Domain Formation
NTNU Norwegian University of Science and Technology(挪威科技大学);MESA+ Institute for Nanotechnology, University of Twente(特温特大学 MESA+ 纳米技术研究所);Lawerence Berkeley National Laboratory(劳伦斯伯克利国家实验室)
Anisotropic Infrared Response and Orientation-dependent Strain-tuning of the Electronic Structure in Nb2SiTe4
具有可调面内各向异性红外响应的二维材料在偏振光电探测器和场效应晶体管中有着广泛的应用前景。黑磷就是一个突出的例子。然而,其具有较差的环境稳定性。在这里,我们报告的应变可调各向异性红外响应的层状材料Nb 2 SiTe 4,其晶格结构类似于2 H-相变金属二硫属化物(TMDC)的三种不同的建筑单元。引人注目的是,一些应变可调的光学跃迁是晶轴依赖的,甚至显示出相反的位移时,单轴应变沿两个面内主轴施加。此外,G 0 W 0-BSE计算表明,各向异性的消光光谱吻合得很好。通过群论分析得到了光学选择规则,并通过轨道耦合分析很好地解释了应变引起的异常位移趋势。我们的综合研究表明,Nb 2SiTe 4是一个很好的候选人可调谐偏振敏感光电子器件。
Anisotropic Photostriction and Strain-modulated Carrier Lifetimes in Orthorhombic Semiconductors
National Center for Nanoscience and Technology, Chinese Academy of Sciences(中国科学院国家纳米科学中心);Institute of Physics, Chinese Academy of Sciences(中国科学院物理研究所);Songshan Lake Materials Laboratory(松山湖材料实验室)
Anisotropic sub-band splitting mechanisms in strained HgTe: a first principles study
Universität Würzburg(维尔茨堡大学);Institute for Topological Insulators(拓扑绝缘体研究所);Pritzker School of Molecular Engineering, The University of Chicago(芝加哥大学普里茨克分子工程学院);University of Trento(特伦托大学);Università degli Studi dell’Aquila(阿奎拉大学);CNR-SPIN(意大利国家研究委员会自旋物理学中心)
Extended transfer matrix method for electron transmission in anisotropic 2D materials: Interplay of strain and (a)periodicity of potentials
Instituto Politécnico Nacional, UPIIH(墨西哥国立理工学院,UPIIH);Instituto de Física, Universidad Nacional Autónoma de México(墨西哥国立自治大学物理研究所);Instituto de Física y Matemáticas, Universidad Michoacana de San Nicolás de Hidalgo(米却肯圣尼古拉斯德伊达尔戈大学物理与数学研究所);Centro de Ciencias Exactas, Universidad del Bío-Bío(比奥-比奥大学精确科学中心)
Understanding the anisotropic response of $β$-Ga$_2$O$_3$ to ion implantation
INESC Microsystems and Nanotechnology(微电子与纳米技术研究所);Institute for Plasmas and Nuclear Fusion, Instituto Superior Técnico, University of Lisbon(里斯本大学高等理工学院等离子体与核聚变研究所);Department of Physics, University of Helsinki(赫尔辛基大学物理系);Department of Nuclear Science and Engineering, Instituto Superior Técnico, University of Lisbon(里斯本大学高等理工学院核科学与工程系);Institute of Ion Beam Physics and Materials Research, Helmholtz-Zentrum Dresden-Rossendorf(德累斯顿罗斯多夫亥姆霍兹中心离子束物理与材料研究所);Centre for Nuclear Sciences and Technologies, Instituto Superior Técnico, University of Lisbon(里斯本大学高等理工学院核科学与技术中心);i3N, Department of Physics, University of Aveiro(阿威罗大学物理系纳米科学研究所)
Anisotropic Dopant and Strain Architectures in WS$_2$ Nanocrystals Driven by Growth Kinetics
Universidade Federal de São Carlos(圣卡洛斯联邦大学);Brazilian Synchrotron Light Laboratory (LNLS), Brazilian Center for Research in Energy and Materials (CNPEM)(巴西同步辐射光实验室(LNLS),巴西能源与材料研究中心(CNPEM));Universidade Federal de Ouro Preto(欧鲁普雷图联邦大学);The Pennsylvania State University(宾夕法尼亚州立大学)
On the complementary roles of anisotropic crack density and anisotropic crack driving force in phase-field modeling of mixed-mode fracture
School of Mechanical Engineering, Changwon National University(昌原国立大学机械工程学院);Department of Smart Shipbuilding Systems, Mokpo National University(木浦国立大学智能造船系统系)
Anisotropic spin-density distribution and magnetic anisotropy of strained La$_{1-x}$Sr$_x$MnO$_3$ thin films: Angle-dependent x-ray magnetic circular dichroism
铁磁薄膜的磁各向异性是由衬底的外延应变通过应变诱导的轨道磁矩和自旋极化电子空间分布的各向异性引起的。然而,在铁磁金属La $_{1-x}$ Sr $_x$ MnO $_3$(LSMO)薄膜研究的X射线线性二色性(XLD)的优先轨道占领一直被发现的平面外的拉伸和压缩外延应变,因此无关的磁各向异性。为了解开这个谜团,我们直接探测自旋极化电子在LSMO薄膜中的优先轨道占领的角度相关的X射线磁性圆二色性(XMCD)的应变。自旋密度分布的各向异性被认为是在平面内的拉伸应变和平面外的压缩应变,与所观察到的磁各向异性。XLD观察到的普遍存在的面外优先轨道占据归因于表面磁死层中自旋向上和自旋向下的面外轨道的占据。