Nonreciprocal transport in Landau-Zener problem
ORAL
Abstract
Responses of quantum materials against external stimuli show a rich variety according to the symmetries of the underlying microscopic Hamiltonian. In particular, nonreciprocal response with a directional transport is an important class of phenomena, which can emerge in noncentrosymmetric materials. As typified in Onsager’s reciprocal relation, however, the presence of the time-reversal symmetry sometimes forbids the directionality.
In this talk, we report two types of new nonreciprocal transport peculiar to time-reversal symmetric insulating systems. One is the dissipative electric current with a nonreciprocal tunneling probability, which emerges due to the geometric correction to the Landau-Zener formula [1]. The other is the spin transport in the presence of the assymetic spin-orbit coupling, which arises due to the assymetric momentum distribution peculiar to the tunneling electrons in a dissipative environment [2].
[1] S. Kitamura, N. Nagaosa, and T. Morimoto, Commun. Phys. 3, 63 (2020).
[2] S. Kitamura, N. Nagaosa, and T. Morimoto, arXiv:2009.03596.
In this talk, we report two types of new nonreciprocal transport peculiar to time-reversal symmetric insulating systems. One is the dissipative electric current with a nonreciprocal tunneling probability, which emerges due to the geometric correction to the Landau-Zener formula [1]. The other is the spin transport in the presence of the assymetic spin-orbit coupling, which arises due to the assymetric momentum distribution peculiar to the tunneling electrons in a dissipative environment [2].
[1] S. Kitamura, N. Nagaosa, and T. Morimoto, Commun. Phys. 3, 63 (2020).
[2] S. Kitamura, N. Nagaosa, and T. Morimoto, arXiv:2009.03596.
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Presenters
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Sota Kitamura
Department of Applied Physics, University of Tokyo, Univ of Tokyo, Department of Applied Physics, The University of Tokyo, The University of Tokyo
Authors
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Sota Kitamura
Department of Applied Physics, University of Tokyo, Univ of Tokyo, Department of Applied Physics, The University of Tokyo, The University of Tokyo
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Naoto Nagaosa
Center for Emergent Matter Science, RIKEN, Department of Applied Physics, University of Tokyo, University of Tokyo, RIKEN
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Takahiro Morimoto
Department of Applied Physics, University of Tokyo, Univ of Tokyo