82 citations · 110 across the 8 of their papers we have counts for
8 papers
Nonperturbative effects in second harmonic generation
Keisuke Kitayama, Masao Ogata
Second-harmonic generation (SHG) is a quintessential probe of inversion symmetry breaking in condensed matter. While perturbative processes are well-documented, the nonpe…
Predicted DC current induced by propagating wave in gapless Dirac materials
Keisuke Kitayama, Masao Ogata
In this paper, we show that the application of propagating waves can induce a DC current even in systems with spatial inversion symmetry. We derive the equation for the DC current…
Phonon-Induced Zero-bias Currents in Solids
Masao Ogata, Hidetoshi Fukuyama
Zero-bias current induced by injected phonons in metals and one-dimensional charge density wave (CDW) systems attached on the surface of the piezoelectric substrate is investigated…
Effects of Berry Curvature and Orbital Magnetic Moment in the Magnetothermoelectric Transport of Bloch Electron Systems
Viktor Könye, Masao Ogata
Thermoelectric transport coefficients up to linear order in the applied magnetic field are microscopically studied using Kubo-Luttinger linear response theory and thermal Green's f…
Elasto-Hall conductivity and the anomalous Hall effect in altermagnets
Keigo Takahashi, Charles R. W. Steward, Masao Ogata +2
Altermagnets break time-reversal symmetry, preserve the crystal translation invariance, and have a spin density with -wave, -wave, etc. momentum dependencies which do not con…
Symmetry requirements for current-induced spin magnetization specific to chiral crystals: Multipole analysis and the hidden spin glide symmetry
Ryosuke Hirakida, Masaki Kato, Masao Ogata
Current-induced spin magnetization (CISM) specific to chiral crystals is microscopically analyzed using multipole theory to identify the necessary hopping and spin-orbit couplings…
Interatomic spin-orbit coupling in atomic orbital-based tight-binding models
Masaki Kato, Masao Ogata
Interatomic hopping mediated by spin-orbit coupling (SOC) entangles spin, orbital and sublattice degrees of freedom of electrons, leading to the emergence of intriguing phenomena s…
Nature of Spin Excitations in Two-dimensional Mott Insulators: Undoped Cuprates and Other Materials
Chang-Ming Ho, V. N. Muthukumar, Masao Ogata +1
We investigate the excitation spectrum of a two-dimensional resonating valence bond (RVB) state. Treating the -flux phase with antiferromagnetic correlations as a variational g…