49 citations · 194 across the 11 of their papers we have counts for
11 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…
First-principles LCPAO Approach for Insulators under Finite Electric Field
Naoya Yamaguchi, Fumiyuki Ishii
We propose a linear-combination-of-pseudo-atomic-orbitals scheme for a finite electric field method based on the modern theory of polarization. We derive the matrix elements of the…
Spin splitting with persistent spin textures induced by the line defect in 1T-phase of monolayer transition metal dichalcogenides
Moh. Adhib Ulil Absor, Iman Santoso, Naoya Yamaguchi +1
The spin splitting driven by spin-orbit coupling in monolayer (ML) transition metal dichalcogenides (TMDCs) family has been widely studied only for the 1H-phase structure, while it…
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…
Photoinduced Rashba spin to charge conversion via interfacial unoccupied state
Jorge Puebla, Florent Auvray, Naoya Yamaguchi +5
At interfaces with inversion symmetry breaking, Rashba effect couples the motion of electrons to their spin; as a result, spin-charge interconversion mechanism can occur. These int…
First-principles Study of Rashba Spin Splitting at Strained SrTiO3(001) Surfaces
Naoya Yamaguchi, Fumiyuki Ishii
We investigated the Rashba spin splittings in a compressive-strained SrTiO(001) ultra thin-film using first-principles calculations. The effect of the polarization due to the c…
Clear variation of spin splitting by changing electron distribution at non-magnetic metal/Bi2O3 interfaces
Hanshen Tsai, Shutaro Karube, Kouta Kondou +3
Large spin splitting at Rashba interface, giving rise to strong spin-momentum locking, is essential for efficient spin-to-charge conversion. Recently, a Cu/Bismuth oxide (Bi2O3) in…
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…
Strain-induced large spin splitting and persistent spin helix at LaAlO/SrTiO interface
Naoya Yamaguchi, Fumiyuki Ishii
We investigated the effect of the tensile strain on the spin splitting at the n-type interface in LaAlO/SrTiO in terms of the spin-orbit coupling coefficient and spin t…
First-principles Study of Rashba Effect in Ultra-thin Bismuth Surface Alloys
Naoya Yamaguchi, Hiroki Kotaka, Fumiyuki Ishii
We performed density functional calculations for ultra-thin bismuth surface alloys: surface alloys of bismuth and face-centered cubic metals Bi/(111)-$(\sqrt{3}\times\sqrt{3})R3…