3 papers
cond-mat.str-el2025
Formulation of spin Nernst effect for spin-nonconserving insulating magnets
Shinnosuke Koyama, Joji Nasu
The spin Nernst effect, an antisymmetric response of a spin current to a temperature gradient, has attracted attention as spin transport phenomenon arising from the topologically n…
cond-mat.str-el2025
Magnetic-field effect on excitonic condensation emergent in extended Falicov-Kimball model
Naoya Ohta, Joji Nasu
We investigate the effects of magnetic fields on excitonic condensation in the extended Falicov-Kimball model, which is a spinless two-orbital Hubbard model with orbital splitting.…
cond-mat.str-el2024
Impact of triplon damping on thermal Hall conductivity in Shastry-Sutherland model
Shinnosuke Koyama, Joji Nasu
We investigate the thermal Hall effect in the Shastry-Sutherland model, incorporating interactions between quasiparticle excitations. In this model, with strong nearest-neighbor in…