119 citations · 344 across the 9 of their papers we have counts for
9 papers
Strong Rashba effect in the localized impurity states of halogen-doped monolayer PtSe2
Moh. Adhib Ulil Absor, Iman Santosa, Harsojo +4
The recent epitaxial growth of 1T-phase of PtSe2 monolayer (ML) has opened a possibility for its novel applications, in particular for spintronics device. However, in contrast to 2…
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…
First-principles study of spin texture and Fermi lines in Bi(111) multi-layer nanofilm
Hiroki Kotaka, Fumiyuki Ishii, Mineo Saito
We have performed a fully relativistic first-principles density functional calculation examining the surface state of bismuth (Bi) (111) multi-layer nanofilm, with up to 20 Bi bila…
Polarity tuning of spin-orbit-induced spin splitting in two-dimensional transition metal dichalcogenides semiconductors
Moh. Adhib Ulil Absor, Iman Santosa, Harsojo +4
The established spin splitting in monolayer (ML) of transition metal dichalcogenides (TMDs) that is caused by inversion symmetry breaking is dictated by mirror symmetry operations…
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…
Strain-controlled spin splitting in the conduction band of monolayer WS2
Moh. Adhib Ulil Absor, Hiroki Kotaka, Fumiyuki Ishii +1
Spin splitting bands that arises in conduction band minimum (CBM) of WS2 monolayer (ML) play an important role in the new spin-orbit phenomena such as spin-valley coupled electroni…
Direct Observation of Nonequivalent Fermi-Arc States of Opposite Surfaces in Noncentrosymmetric Weyl Semimetal NbP
S. Souma, Zhiwei Wang, H. Kotaka +9
We have performed high-resolution angle-resolved photoemission spectroscopy (ARPES) on noncentrosymmetric Weyl semimetal candidate NbP, and determined the electronic states of both…
Persistent spin helix on a wurtzite ZnO(10-10) surface: First-principles density-functional study
Moh Adhib Ulil Absor, Fumiyuki Ishii, Hiroki Kotaka +1
The persistent spin helix (PSH) that has been widely and exclusively studied in zinc-blende structures is revealed for the first time on the surface of a wurtzite structure. Throug…
Spin-Orbit Interaction Effects in the Electronic Structure of B20-type CoSi: First-Principles Density Functional Study
Fumiyuki Ishii, Hiroki Kotaka, Takashi Onishi
We have performed fully relativistic first-principles density functional calculations for non-magnetic B20-type CoSi. The spin-orbit interaction has crucial effects on the electron…