231 citations · 1.9k across the 55 of their papers we have counts for
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Higher-Order Topological Crystalline Insulating Phase and Quantized Hinge Charge in Topological Electride Apatite
Motoaki Hirayama, Ryo Takahashi, Satoru Matsuishi +2
In higher-order topological insulators, bulk and surface electronic states are gapped, while there appear gapless hinge states protected by spatial symmetry. Here we show by ab ini…
Electronic structure of interstitial hydrogen in In-Ga-Zn-O semiconductor simulated by muon
K. M. Kojima, M. Hiraishi, H. Okabe +7
We report on the local electronic structure of interstitial muon (Mu) as pseudo-hydrogen in In-Ga-Zn oxide (IGZO) semiconductor studied by muon spin rotation/relaxation (SR) exp…
Electronic correlation in the quasi-two-dimensional electride YC
M. Hiraishi, K. M. Kojima, I. Yamauchi +10
Magnetic properties of the electride compound YC were investigated by muon spin rotation and magnetic susceptibility on two samples with different form (poly- and single-crysta…
Electrides as a New Platform of Topological Materials
Motoaki Hirayama, Satoru Matsuishi, Hideo Hosono +1
Recent discoveries of topological phases realized in electronic states in solids have revealed an important role of topology, which ubiquitously appears in various materials in nat…
Cage Electron-Hydroxyl Complex State as Electron Donor in Mayenite
M. Hiraishi, K. M. Kojima, M. Miyazaki +6
It is inferred from the chemical shift of muon spin rotation (SR) spectra that muons implanted in pristine (fully oxidized) mayenite, [CaAlO[$\square_…
Hydrogen Ordering and New Polymorph of Layered Perovskite Oxyhydrides: Sr2VO4-xHx
Joonho Bang, Satoru Matsuishi, Haruhiro Hiraka +7
Compositionally tunable vanadium oxyhydrides Sr2VO4-xHx (x = 0 - 1) without considerable anion vacancy were synthesized by high-pressure solid state reaction. The crystal structure…
Epitaxial Growth and Electronic Structure of a Layered Zinc Pnictide Semiconductor, beta-BaZn2As2
Zewen Xiao, Fan-Yong Ran, Hidenori Hiramatsu +3
BaZn2As2 is expected for a good p-type semiconductor and has two crystalline phases of an orthorhombic alpha phase and a higher-symmetry tetragonal beta phase. Here, we report high…
Observation of Jonscher Law in AC Hopping Conduction of Electron-Doped Nanoporous Crystal 12CaO7Al2O3 in THz Frequency Range
H. Harimochi, J. Kitagawa, M. Ishizaka +4
We have performed terahertz time-domain spectroscopy of carrier-doped nanoporous crystal 12CaO7Al2O3 showing the Mott variable range hopping at room temperature. The real part of t…