Current response of nonequilibrium steady states in the Landau-Zener problem: Nonequilibrium Green's function approach
Current response of nonequilibrium steady states in the Landau-Zener problem: Nonequilibrium Green's function approach
复制标题
朗道-齐纳问题中非平衡稳态的当前响应:非平衡格林函数方法
DOI:
10.1103/physrevb.102.245141
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发表时间:
2020
影响因子:
3.7
通讯作者:
Morimoto Takahiro
中科院分区:
文献类型:
--
作者:
Kitamura Sota;Nagaosa Naoto;Morimoto Takahiro
The carrier generation in insulators subjected to strong electric fields is characterized by the Landau-Zener formula for the tunneling probability with a nonperturbative exponent. Despite its long history with diverse applications and extensions, study of nonequilibrium steady states and associated current response in the presence of the generated carriers has been mainly limited to numerical simulations so far. Here, we develop a framework to calculate the nonequilibrium Green's function of generic insulating systems under a DC electric field, in the presence of a fermionic reservoir. Using asymptotic expansion techniques, we derive a semiquantitative formula for the Green's function with nonperturbative contribution. This formalism enables us to calculate dissipative current response of the nonequilibrium steady state, which turns out to be not simply characterized by the intraband current proportional to the tunneling probability. We also apply the present formalism to noncentrosymmetric insulators, and propose nonreciprocal charge and spin transport peculiar to tunneling electrons.
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影响因子:
29.4
作者:
N. Nagaosa;T. Morimoto
通讯作者:
N. Nagaosa;T. Morimoto
DOI:
--
发表时间:
2010
期刊:
影响因子:
--
作者:
F. Heidrich;I. González;K. Al;A. Feiguin;M. Rozenberg;E. Dagotto
通讯作者:
E. Dagotto
影响因子:
3.7
作者:
Keiji Saito;M. Wubs;S. Kohler;Y. Kayanuma;P. Hānggi
通讯作者:
Keiji Saito;M. Wubs;S. Kohler;Y. Kayanuma;P. Hānggi
影响因子:
4.6
作者:
T. Morimoto;N. Nagaosa
通讯作者:
N. Nagaosa
影响因子:
4.4
作者:
T. George;Ying‐Wei Lin
通讯作者:
Ying‐Wei Lin