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arXiv 1608.01931cond-mat.str-el
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有序绝缘体电阻开关的微观理论:电子机制与热机制

Microscopic Theory of Resistive Switching in Ordered Insulators: Electronic vs. Thermal Mechanism

Jiajun Li, Camille Aron, Gabriel Kotliar, Jong E. Han

摘要:

我们研究了有序相关绝缘体中,当被强偏压从平衡态驱动时,电阻的戏剧性开关。对相互作用电子的驱动耗散晶格的微观计算解释了阻变(RS)的主要实验特征,如滞后$I$ - $V$曲线和热传导细丝的形成。在RS的能量分辨电子分布揭示了潜在的非平衡电子机制,即朗道-齐纳隧道,也证明了热描述的热电子温度,估计从分布的第一时刻,匹配的平衡相变温度。我们讨论了细丝生长和负微分电阻之间的纠缠关系,以及晶体结构和无序对RS的影响。

英文摘要:

We investigate the dramatic switch of resistance in ordered correlated insulators, when driven out of equilibrium by a strong voltage bias. Microscopic calculations on a driven-dissipative lattice of interacting electrons explain the main experimental features of resistive switching (RS), such as the hysteretic $I$-$V$ curves and the formation of hot conductive filaments. The energy-resolved electron distribution at the RS reveals the underlying nonequilibrium electronic mechanism, namely Landau-Zener tunneling, and also justifies a thermal description where the hot-electron temperature, estimated from the first moment of the distribution, matches the equilibrium phase transition temperature. We discuss the tangled relationship between filament growth and negative differential resistance, and the influence of crystallographic structure and disorder in the RS.

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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