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arXiv 2404.04789cond-mat.mes-hallcond-mat.mtrl-scicond-mat.str-el
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运动电荷密度波中的非互易非线性响应

Nonreciprocal Nonlinear Responses in Moving Charge Density Waves

Ying-Ming Xie, Hiroki Isobe, Naoto Nagaosa

AI总结:

本文通过伽利略变换将运动电荷密度波映射到共动参考系,解决了时变系统响应难以评估的问题,并证明非互易非线性响应源于CDW运动对伽利略相对性的破坏。

摘要:

非公度电荷密度波态(CDWs)在脱钉后可以在流动极限下表现出稳态运动,表现为具有时间依赖状态的非平衡系统。由于运动的CDW像电流一样同时破坏时间反演和宇称(空间反演)对称性,人们可以推测这种运动会产生非互易非线性响应。然而,运动CDW的序参量在实验室参考系中本质上是时间依赖的,评估这种时变系统的响应已知是具有挑战性的。在本工作中,遵循伽利略相对性原理,我们通过伽利略变换将系统映射到具有静态CDW状态的共动参考系,从而在实验室参考系中解决了这一时间依赖的困难问题。我们明确表明,非互易非线性响应将通过CDW状态的运动破坏伽利略相对性而产生。

英文摘要:

The incommensurate charge density wave states (CDWs) can exhibit steady motion in the flow limit after depinning, behaving as a nonequilibrium system with time-dependent states. Since the moving CDW, like an electric current, breaks both time-reversal and inversion symmetries, one may speculate the emergence of nonreciprocal nonlinear responses from such motion. However, the moving CDW order parameter is intrinsically time-dependent in the lab frame, and it is known to be challenging to evaluate the responses of such a time-varying system. In this work, following the principle of Galilean relativity, we resolve this time-dependent hard problem in the lab frame by mapping the system to the comoving frame with static CDW states through the Galilean transformation. We explicitly show that the nonreciprocal nonlinear responses would be generated by the movement of CDW states through violating Galilean relativity.

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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