43 citations · 121 across the 6 of their papers we have counts for
6 papers
Thermoelectric effect in kagome lattice enhanced at van Hove singularities
Kaiki Shibata, Naoya Yamaguchi, Hikaru Sawahata +1
We have performed first-principles calculations using density functional theory on a kagome lattice model with a chiral spin state, as a representative example demonstrating signif…
First-principles calculation of anomalous Hall and Nernst conductivity by local Berry phase
Hikaru Sawahata, Naoya Yamaguchi, Susumu Minami +1
In this study, we implemented a finite-difference algorithm for computing anomalous Hall and Nernst conductivity. Based on the expression to evaluate the Berry curvature in an insu…
Ambient pressure Dirac electron system in quasi-two-dimensional molecular conductor -(BETS)I
Shunsuke Kitou, Takao Tsumuraya, Hikaru Sawahata +5
We investigated the precise crystal structures and electronic states in a quasi-two-dimensional molecular conductor -(BETS)I at ambient pressure. The electronic resistiv…
Electric-field-induced Z2 topological phase transition in strained single bilayer Bi(111)
Hikaru Sawahata, Naoya Yamaguchi, Fumiyuki Ishii
For controlling the critical electric fields of the topological phase transition in single bilayer Bi(111), we investigated topological phases in a strained system through first-pr…
Large anomalous Nernst coefficient in an oxide Skyrmion crystal Chern insulator
Yo Pierre Mizuta, Hikaru Sawahata, Fumiyuki Ishii
A sizable transverse thermoelectric coefficient N , large to the extent that it potentially serves applications, is predicted to arise, by means of first-principles calculations, i…
First-principles study of electric-field-induced topological phase transition in one-bilayer Bi(111)
Hikaru Sawahata, Naoya Yamaguchi, Hiroki Kotaka +1
Using first-principles calculations, we found the topological phase transition induced by electric fields in one-bilayer Bi(111). The bandgap decreased with increasing electric fie…