M. Hirayama

activity

20092026

most citedWeyl Node and Spin Texture in Trigonal Tellurium and Selenium

285 citations · 2.6k across the 51 of their papers we have counts for

collaborators

Showing 2022Show all

8 papers · 1 filter

cond-mat.mes-hall2022★ 1 cited

Topological invariant and domain connectivity in moiré materials

Ikuma Tateishi, Motoaki Hirayama

Recently, a moiré material has been proposed in which multiple domains of different topological phases appear in the moiré unit cell due to a large moiré modulation. Topological pr…

cond-mat.mtrl-sci2022

Signature of topological band crossing in ferromagnetic Cr1/3NbSe2 epitaxial thin film

Bruno Kenichi Saika, Satoshi Hamao, Yuki Majima +14

In intercalated transition metal dichalcogenides (I-TMDC), transition metal intercalation introduces magnetic phases which in some cases induce topological band crossing. However,…

cond-mat.supr-con2022★ 3 cited

$A b$ $ini t i o$ material design of Ag-based oxides for high- $T_{c}$ superconductor

Motoaki Hirayama, Michael Thobias Schmid, Terumasa Tadano +2

We propose silver-based oxides with layered perovskite structure as candidates of exhibiting intriguing feature of strongly correlated electrons. The compounds show unique covalenc…

cond-mat.mtrl-sci2022★ 15 cited

Efficient hydrogen evolution reaction due to topological polarization

Ming-Chun Jiang, Guang-Yu Guo, Motoaki Hirayama +3

Materials carrying topological surface states (TSS) provide a fascinating platform for the hydrogen evolution reaction (HER). Based on systematic first-principles calculations for…

cond-mat.str-el2022★ 30 cited

$A b$ $ini t i o$ low-energy effective Hamiltonians for high-temperature superconducting cuprates Bi $_{2}$ Sr $_{2}$ CuO $_{6}$ , Bi $_{2}$ Sr $_{2}$ CaCu $_{2}$ O $_{8}$ , HgBa $_{2}$ CuO $_{4}$ and CaCuO $_{2}$

Jean-Baptiste Morée, Motoaki Hirayama, Michael Thobias Schmid +2

We derive $ab$ $ini t i o$ low-energy effective Hamiltonians (LEH) for high-temperature superconducting (SC) copper oxides Bi $_{2}$ Sr $_{2}$ CuO $_{6}$ (Bi2201, $N_{ℓ} = 1$ , $T_c^{\rm exp} \s…

cond-mat.supr-con2022★ 4 cited

$Ab initio$ Materials Design of Superconductivity in $d^{9}$ Nickelates

Motoharu Kitatani, Yusuke Nomura, Motoaki Hirayama +1

Motivated by the recent theoretical materials design of superconducting $d^{9}$ nickelates for which the charge transfer from the NiO $_{2}$ to the block layer is completely suppressed…

cond-mat.str-el2022

$Ab initio$ downfolding based on the GW approximation for infinite-layer nickelates

Motoaki Hirayama, Yusuke Nomura, Ryotaro Arita

We derive an effective three-orbital model for the infinite-layer nickelates based on the band structure obtained by the GW approximation (GWA), where we consider the Ni 3$d_{x^2-y…

cond-mat.mtrl-sci2022

Interstitial-Electron-Induced Topological Molecular Crystals

Tonghua Yu, Ryotaro Arita, Motoaki Hirayama

Topological phases usually are unreachable in molecular solids, which are characteristic of weakly dispersed energy bands with a large gap, in contrast to topological materials. In…

Topological invariant and domain connectivity in moiré materials

Signature of topological band crossing in ferromagnetic Cr1/3NbSe2 epitaxial thin film

Ab initio material design of Ag-based oxides for high-Tc​ superconductor

Efficient hydrogen evolution reaction due to topological polarization

Ab initio low-energy effective Hamiltonians for high-temperature superconducting cuprates Bi2​Sr2​CuO6​, Bi2​Sr2​CaCu2​O8​, HgBa2​CuO4​ and CaCuO2​

Ab initio Materials Design of Superconductivity in d9 Nickelates

Ab initio downfolding based on the GW approximation for infinite-layer nickelates

Interstitial-Electron-Induced Topological Molecular Crystals

$A b$ $ini t i o$ material design of Ag-based oxides for high- $T_{c}$ superconductor

$A b$ $ini t i o$ low-energy effective Hamiltonians for high-temperature superconducting cuprates Bi $_{2}$ Sr $_{2}$ CuO $_{6}$ , Bi $_{2}$ Sr $_{2}$ CaCu $_{2}$ O $_{8}$ , HgBa $_{2}$ CuO $_{4}$ and CaCuO $_{2}$

$Ab initio$ Materials Design of Superconductivity in $d^{9}$ Nickelates

$Ab initio$ downfolding based on the GW approximation for infinite-layer nickelates