搜索结果: 1-15 共查到“知识库 电介质物理学”相关记录83条 . 查询时间(1.328 秒)
径向压缩碳纳米管的电子输运性质
碳纳米管 电子输运性质 径向形变 第一性原理
2022/3/24
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嵌入不透水球体的复合多孔介质广泛存在于地下水渗流领域,由于不透水球体的影响,多孔介质中的水在流经不透水球体时发生绕流,且距离球体越近绕流现象越明显。为求解该复合介质的渗流场和等效渗透系数,在球坐标系下采用非线性Brinkman-extended Darcy方程,以无穷远处单向来流均匀和球面不滑移条件作为边界条件,求解出球体周围渗流流速与压强的解析解。分析该解析解表达式可知,此复合介质渗流场流速和压...
Quantum percolation in quantum spin Hall antidot systems
Quantum percolation quantum spin Hall antidot systems
2012/2/27
We study the influences of antidot-induced bound states on transport properties of two- dimensional quantum spin Hall insulators. The bound statesare found able to induce quantum percolation in the or...
Unusual pattern formation on Si(100) due to low energy ion bombardment
Unusual pattern formation Si(100) low energy ion bombardment
2012/2/27
In this paper evolution of silicon surface topography, under low energy ion bombardment, is investigated at higher oblique incident angles in the range of 63\degree-83\degree. Si(100) substrates were ...
Highly tunable spin-dependent electron transport through carbon atomic chains connecting two zigzag graphene nanoribbons
Highly tunable spin-dependent electron transport carbon atomic chains zigzag graphene nanoribbons
2012/2/27
Motivated by recent experiments of successfully carving out stable carbon atomic chains from graphene [Meyer et al. Nature (London) 454, 319 (2008); Jin et al. Phys. Rev. Lett. 102, 205501 (2009)] we ...
Tailoring population inversion in Landau-Zener-Stuckelberg interferometry of flux qubits
Tailoring population inversion Landau-Zener-Stuckelberg interferometry flux qubits
2012/2/27
We distinguish different mechanisms for population inversion in flux qubits driven by dc+ac magnetic fields. We show that for driving amplitudes such that there are Landau-Zener-St\"uckelberg interefe...
Effect of charged impurity correlation on transport in monolayer and bilayer graphene
charged impurity correlation transport monolayer bilayer graphene
2012/2/27
We study both monolayer and bilayer graphene transport properties taking into account the presence of correlations in the spatial distribution of charged impurities. In particular we find that the exp...
Spin current and polarization reversal through a single-molecule magnet with ferromagnetic electrodes
Spin current polarization reversal single-molecule magnet ferromagnetic electrodes
2012/2/27
We theoretically study the spin-polarized transport through a single-molecule magnet, which is weakly coupled to ferromagnetic leads, by means of the rate-equation approach. We consider both the ferro...
The Role of Nonlinear Dynamics in Quantitative Atomic Force Microscopy
Role Nonlinear Dynamics Quantitative Atomic Force Microscopy
2012/2/27
Various methods of force measurement with the Atomic Force Microscope (AFM) are compared for their ability to accurately determine the tip-surface force from analysis of the nonlinear cantilever motio...
Impurity-assisted Andreev reflection at a spin-active half-metal-superconductor interface
Impurity-assisted Andreev reflection spin-active half-metal-superconductor interface
2012/2/27
The Andreev reflection amplitude at a clean interface between a half-metallic ferromagnet (H) and a superconductor (S) for which the half metal's magnetization has a gradient perpendicular to the inte...
Manipulating infrared photons using plasmons in transparent graphene superlattices
Manipulating infrared photons plasmons transparent graphene superlattices
2012/2/27
Superlattices are artificial periodic nanostructures which can control the flow of electrons. Their operation typically relies on the periodic modulation of the electric potential in the direction of ...
Lattice Results for Low Moments of Light Meson Distribution Amplitudes
Low Moments of Light Meson Distribution Amplitudes
2011/1/14
As part of the UKQCD and RBC collaborations’ Nf = 2+1 domain-wall fermion phenomenology
programme, we calculate the first two moments of the light-cone distribution amplitudes of the
pseudoscalar me...
Laboratory experiments and numerical simulation reveal that a submerged intruder dragged hor-
izontally at constant velocity within a granular medium experiences a lift force whose sign and
magnitud...