5 papers
Dirac Electrons in AC-Magnetic Fields: -Landau Levels and Chiral Anomaly-Induced Homodyne Effect
Sota Kitamura, Takashi Oka
Floquet engineering, which involves controlling systems through time-periodic driving, is a method for coherently manipulating quantum materials and realizing dynamical states with…
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…
Controllable photocurrent generation in Dirac systems with two frequency drives
Yuya Ikeda, Sota Kitamura, Takahiro Morimoto
We study the bulk photovoltaic effect (BPVE) in Dirac and Weyl semimetals under two-frequency light irradiation. We show that the BPVE emerges for centrosymmetric Dirac and Weyl se…
Brillouin zone folding method for quasiperiodic superconductivity in multilayer systems: application to electronic structure and optical responses
Mao Yoshii, Sota Kitamura, Takahiro Morimoto
We construct an efficient momentum space approach to the superconductivity in quasiperiodic multilayer systems. To this end, we extend the Brillouin zone (BZ) folding method to the…