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arXiv 1702.04553cond-mat.stat-mechcond-mat.mes-hall
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类石墨烯结构中的排斥驱动流和自旋相关输运

Driven flow with exclusion and spin-dependent transport in graphenelike structures

S. L. A. de Queiroz, R. B. Stinchcombe

摘要:

我们提出了一个简化的描述自旋相关的电子输运在蜂窝晶格结构与自旋轨道相互作用,使用概括的随机非平衡模型称为完全不对称的简单排斥过程。利用平均场论和数值模拟方法研究了具有开放边界、外加粒子注入($α$)和喷射($β$)速率的准一维系统中的电流、密度分布和电流极化。我们调查的影响,允许双网站占用,根据泡利的不相容原理,对感兴趣的数量的行为。我们发现,双占用率的特定组合,即高$α$和低$β$,显示出强烈的签名,但在其他方面,其影响被定量抑制。评论本研究结果适当掺杂的类石墨烯结构的实验上可能的相关性。

英文摘要:

We present a simplified description for spin-dependent electronic transport in honeycomb-lattice structures with spin-orbit interactions, using generalizations of the stochastic non-equilibrium model known as the totally asymmetric simple exclusion process. Mean field theory and numerical simulations are used to study currents, density profiles and current polarization in quasi- one dimensional systems with open boundaries, and externally-imposed particle injection ($α$) and ejection ($β$) rates. We investigate the influence of allowing for double site occupancy, according to Pauli's exclusion principle, on the behavior of the quantities of interest. We find that double occupancy shows strong signatures for specific combinations of rates, namely high $α$ and low $β$, but otherwise its effects are quantitatively suppressed. Comments are made on the possible relevance of the present results to experiments on suitably doped graphenelike structures.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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