Emergent electromagnetic induction and adiabatic charge pumping in noncentrosymmetric weyl semimetals

Hiroaki Ishizuka, Tomoya Hayata, Masahito Ueda, Naoto Nagaosa

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Abstract

The photovoltaic effect due to the adiabatic quantum phase in noncentrosymmetric Weyl semimetals is studied. We particularly focus on the case in which an external ac electric field is applied. By considering a generalized Weyl Hamiltonian with nonlinear terms, we show that the photocurrent is induced by circularly, rather than linearly, polarized light. This photovoltaic current can be understood as an emergent electromagnetic induction in momentum space; the Weyl node is a magnetic monopole in momentum space, the circular motion of which induces the electric field. This result is distinct from conventional photovoltaic effects, and the estimated photocurrent is ∼10-1-101 nA, which can be detected experimentally.

Original languageEnglish
Article number216601
JournalPhysical Review Letters
Volume117
Issue number21
DOIs
Publication statusPublished - 2016 Nov 18
Externally publishedYes

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ASJC Scopus subject areas

  • Physics and Astronomy(all)

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