Nonreciprocal Nonlinear Responses in the Nonequilibrium States: Moving Charge Density Waves

Autor:	Xie, Ying-Ming, Isobe, Hiroki, Nagaosa, Naoto
Rok vydání:	2024
Předmět:	Condensed Matter - Mesoscale and Nanoscale Physics Condensed Matter - Materials Science Condensed Matter - Strongly Correlated Electrons
Druh dokumentu:	Working Paper
Popis:	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. Our work demonstrates not only nonreciprocal nonlinear responses in nonequilibrium states but also the application of Galilean transformation in simplifying time-dependent problems. Comment: 5 pages, 3 figures, plus Supplementary Material
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/2404.04789 Zobrazit plný text záznamu View this record from Arxiv