713 citations · 6.9k across the 81 of their papers we have counts for
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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…
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…
Photovoltaic effect by soft phonon excitation
Yoshihiro Okamura, Takahiro Morimoto, Naoki Ogawa +7
Photodetection is an indispensable function of optoelectronic devices in modern communication and sensing systems. Contrary to the near-infrared/visible regions, the fast and sensi…
Optical response of the Leggett mode in multiband superconductors in the linear response regime
Takumi Kamatani, Sota Kitamura, Naoto Tsuji +2
We study optical responses of Leggett modes in multiband superconductors in the linear response regime. The Leggett mode is a collective mode unique to multiband superconductors th…
Electrical conductivity in helical and conical magnetic states
Shun Okumura, Takahiro Morimoto, Yasuyuki Kato +1
We theoretically study the electrical conductivity in a one-dimensional helimagnet whose spin texture changes from helimagnetic to conical magnetic, and to forced ferromagnetic sta…