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arXiv 1106.0604cond-mat.str-el
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有限电场驱动下的可积莫特绝缘体

Integrable Mott insulators driven by finite electric field

Marcin Mierzejewski, Janez Bonca, Peter Prelovsek

摘要:

本文提出了一种从驱动孤立系的研究中提取稳态非平衡电流的方法,并将其应用于高温下的一维莫特绝缘体模型。虽然在不可积模型的非平衡条件可以占内部加热,可积性导致一个强烈的非线性直流响应与消失的小直流电导率的线性响应制度。这一发现是一致的平衡结果,直流极限的光学电导率确定在存在一个弱的和减少的扰动。

英文摘要:

We develop a method for extracting the steady nonequilibrium current from studies of driven isolated systems, applying it to the model of one-dimensional Mott insulator at high temperatures. While in the nonintegrable model the nonequilibrium conditions can be accounted by internal heating, the integrability leads to a strongly nonlinear dc response with vanishingly small dc conductivity in the linear--response regime. The finding is consistent with equilibrium results for dc limit of the optical conductivity determined in the presence of a weak and decreasing perturbation.

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