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Spin Hall Effect of Excitons
Shun-ichi Kuga, Shuichi Murakami, Naoto Nagaosa
Spin Hall effect for excitons in alkali halides and in Cu_2O is investigated theoretically. In both systems, the spin Hall effect results from the Berry curvature in k space, which…
Enhanced spin Hall effect by resonant skew scattering in orbital-selective Kondo effect
Guang-Yu Guo, Sadamichi Maekawa, Naoto Nagaosa
The enhanced spin Hall effect in Au metal due to the resonant skew scattering is studied with first-principles band structure calculations. Especially the gigantic spin Hall angle…
Quantum spin Hall effect in a transition metal oxide Na2IrO3
Atsuo Shitade, Hosho Katsura, Jan Kunes +3
We study theoretically the electronic states in a transition metal oxide NaIrO, in which both the spin-orbit interaction and the electron correlation play crucial role…
Current-induced dynamics of spiral magnet
Kohei Goto, Hosho Katsura, Naoto Nagaosa
We study the dynamics of the spiral magnet under the charge current by solving the Landau-Lifshitz-Gilbert equation numerically. In the steady state, the current induces…
Topological spin-current in non-centrosymmetric superconductors
Yukio Tanaka, Takehito Yokoyama, Alexander V. Balatsky +1
We study the spin transport properties of the non-centrosymmetric superconductor with time-reversal-symmetry where spin-triplet -wave and spin-singlet s-wave p…
Quantum Dynamics of Multiferroic Helimagnets: a Schwinger-Boson Approach
Hosho Katsura, Shigeki Onoda, Jung Hoon Han +1
We study the quantum dynamics/fluctuation of the cycloidal helical magnet in terms of the Schwinger boson approach. In sharp contrast to the classical fluctuation, the quantum fluc…