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Giant Magnetochiral Anisotropy in Weyl-semimetal WTe2 Induced by Diverging Berry Curvature
Tomoyuki Yokouchi, Yuya Ikeda, Takahiro Morimoto +1
The concept of Berry curvature is essential for various transport phenomena. However, an effect of the Berry curvature on magnetochiral anisotropy, i.e. nonreciprocal magneto-trans…
Gap labeling theorem for multilayer thin film heterostructures
Mao Yoshii, Sota Kitamura, Takahiro Morimoto
Quasiperiodic systems show a universal gap structure due to quasiperiodicity which is analogous to gap openings at the Brillouin zone boundary in periodic systems. The integrated d…
Nonlinear spin current of photoexcited magnons in collinear antiferromagnets
Kosuke Fujiwara, Sota Kitamura, Takahiro Morimoto
We study the nonlinear magnon spin current induced by an ac electric field under light irradiation in collinear antiferromagnets with broken inversion symmetry. For linearly polari…
Effects of relaxation on photovoltaic effect and possibility of photocurrent within transparent region
Yugo Onishi, Hikaru Watanabe, Takahiro Morimoto +1
We theoretically study photocurrents in metals that break both inversion and symmetries within the transparent region. We find that the system under the…
Thermal Hall responses in frustrated honeycomb spin systems
Kosuke Fujiwara, Sota Kitamura, Takahiro Morimoto
We study geometrical responses of magnons driven by a temperature gradient in frustrated spin systems. While Dzyaloshinskii-Moriya (DM) interactions are usually incorporated to obt…
Theory of shift heat current and its application to electron-phonon coupled systems
Yugo Onishi, Takahiro Morimoto, Naoto Nagaosa
We propose a heat current analog of the shift current, "shift heat current". We study nonlinear heat current responses to an applied ac electric field by a diagrammatic method and…