4 papers
Transconductance as a Probe of Valley Thermodynamics in Multilayer WSe
Katsunori Wakabayashi, Souren Adhikary, Tomoaki Kameda
Transconductance is a central figure of merit in field-effect transistors, typically governed by charge accumulation and carrier mobility. In multilayer WSe transistors, howeve…
Shift current conductivity in monolayer SnS: a tight-binding analysis
Yuki Kusunoki, Tomoaki Kameda, Katsunori Wakabayashi
We investigate the bulk photovoltaic effect in monolayer SnS using an effective tight-binding model derived from first-principles calculations. By comparing short-range and long-ra…
Optically induced spin Hall current in monolayer Janus NbSSe: A first-principles study
Souren Adhikary, Tomoaki Kameda, Katsunori Wakabayashi
Monolayer Janus transition-metal dichalcogenides possess Ising- and Rashba-type spin-orbit-couplings (SOC), leading to intriguing spin splitting effects at K and K, and around $…
Optically induced spin Hall current in Janus transition-metal dichalcogenides
Tomoaki Kameda, Katsunori Wakabayashi
Monolayer Janus transition-metal dichalcogenides (TMDCs), such as WSeTe, exhibit Rashba-type spin-orbit coupling (SOC) due to broken out-of-plane mirror symmetry. Here, we theoreti…