991 citations · 1.9k across the 29 of their papers we have counts for
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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…
Floquet topological superconductivity induced by chiral many-body interactions
Sota Kitamura, Hideo Aoki
We study how a -wave superconductivity is changed when illuminated by circularly-polarised light (CPL) in the repulsive Hubbard model in the strong-coupling regime. We adopt the…
Floquet engineering of electric polarization with two-frequency drive
Yuya Ikeda, Sota Kitamura, Takahiro Morimoto
Electric polarization is a geometric phenomenon in solids and has a close relationship to the symmetry of the system. Here we propose a mechanism to dynamically induce and manipula…
Topological charge pumping in quasiperiodic systems characterized by Bott index
Mao Yoshii, Sota Kitamura, Takahiro Morimoto
We study topological charge pumping in one-dimensional quasiperiodic systems. Since these systems lack periodicity, we cannot use the conventional approach based on the topological…
Electric polarization and nonlinear optical effects in noncentrosymmetric magnets
Takahiro Morimoto, Sota Kitamura, Shun Okumura
We study electric polarization and nonlinear optical effects in spin systems with broken inversion symmetry. We apply strong coupling expansion to the underlying electronic Hamilto…