7 papers
Emergent induction in magnetic Weyl semimetals
Takahiro Anan, Takahiro Morimoto
We theoretically study emergent electromagnetic responses in Weyl semimetals. Focusing on magnetic Weyl semimetals, we develop a general theory of emergent induction driven by magn…
Quantum-geometric shift of quasiequilibrium: Origin of nonreciprocal current driven by quantum-metric dipole
Sota Kitamura, Takahiro Anan, Takahiro Morimoto
We study nonlinear DC electric transport of quantum-metric origin by combining adiabatic perturbation theory with the nonequilibrium Green function approach. The adiabatic ansatz p…
Spinon shift current in a noncentrosymmetric quantum spin chain
Ryosuke Yamashita, Shintaro Takayoshi, Takahiro Morimoto
We theoretically study direct current generation in a quantum spin chain induced by spinon excitations by light irradiation. We consider a one-dimensional (1D) antiferromag…
Nonreciprocal current induced by dissipation in time-reversal symmetric systems
Takahiro Anan, Sota Kitamura, Takahiro Morimoto
We study nonreciprocal current response in noncentrosymmetric crystals under time-reversal symmetry. We reveal that the nonreciprocal current appears in a dissipative system throug…
Formulation of the orbital magnetic moment in multiorbital tight-binding models: Application to the inverse Faraday effect
Kosuke Tazuke, Takahiro Morimoto, Sota Kitamura
We establish a theoretical formulation of the orbital magnetic moment in multiorbital tight-binding models, focusing on the role of the electric dipole. We demonstrate that the tot…
Quantum Optical Spanner: Twisting Superconductors with Vortex Beam via Higgs Mode
Daemo Kang, Sota Kitamura, Takahiro Morimoto
Light carrying orbital angular momentum (OAM)--known as vortex beams--has broadened the scope of understanding and applications of light's angular momentum. Optical tweezers using…