arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2007.04143cond-mat.mes-hallcond-mat.mtrl-scicond-mat.stat-mech
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开边界条件下系统的Drude权

Drude weight in systems with open boundary conditions

Gabriele Bellomia, Raffaele Resta

摘要:

多电子导电系统响应于宏观场而经历自由加速。德鲁德重量$D$ --也称为电荷刚度--测量电子的绝热(逆)惯性; $D$形式表达式需要周期性边界条件。相反,当在开放边界条件下处理有界样本时,没有电流流动,并且恒定(外部)场仅使样本极化:法拉第笼效应。尽管如此,低频场诱导强迫振荡:我们在这里表明,有界系统的低频线性响应主要由绝热惯性,并允许另一种评价$D$。模型一维系统的模拟证明了我们的主要信息。

英文摘要:

A many-electron conducting system undergoes free acceleration in response to a macroscopic field. The Drude weight $D$---also called charge stiffness---measures the adiabatic (inverse) inertia of the electrons; the $D$ formal expression requires periodic boundary conditions. When instead a bounded sample is addressed within open boundary conditions, no current flows and a constant (external) field only polarizes the sample: the Faraday cage effect. Nonetheless a low-frequency field induces forced oscillations: we show here that the low-frequency linear response of the bounded system is dominated by the adiabatic inertia and allows an alternative evaluation of $D$. Simulations on model one-dimensional systems demonstrate our main message.

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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