407 citations · 2.3k across the 74 of their papers we have counts for
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Topological Band Inversion and Chiral Majorana Mode in Hcp Thallium
Motoaki Hirayama, Takuya Nomoto, Ryotaro Arita
The chiral Majorana fermion is an exotic particle that is its own antiparticle. It can arise in a one-dimensional edge of topological materials, and especially that in a topologica…
Bulk photovoltaic effect in antiferromagnet: Role of collective spin dynamics
Junta Iguchi, Hikaru Watanabe, Yuta Murakami +2
Inspired by recent advancements in the bulk photovoltaic effect which can extend beyond the independent particle approximation (IPA), this study delves into the influence of collec…
Algorithm for spin symmetry operation search
Kohei Shinohara, Atsushi Togo, Hikaru Watanabe +3
A spin space group provides a suitable way to fully exploit the symmetry of a spin arrangement with a negligible spin-orbit coupling. There has been a growing interest in applying…
Symmetry analysis with spin crystallographic groups: Disentangling effects free of spin-orbit coupling in emergent electromagnetism
Hikaru Watanabe, Kohei Shinohara, Takuya Nomoto +2
Recent studies identified spin-order-driven phenomena such as spin-charge interconversion without relying on the relativistic spin-orbit interaction. Those physical properties can…
High-performance descriptor for magnetic materials: Accurate discrimination of magnetic structure
Michi-To Suzuki, Takuya Nomoto, Eiaki V. Morooka +2
The magnetic structure is crucial in determining the physical properties inherent in magnetic compounds. We present an adequate descriptor for magnetic structure with proper magnet…
Spontaneous topological Hall effect induced by non-coplanar antiferromagnetic order in intercalated van der Waals materials
H. Takagi, R. Takagi, S. Minami +14
In ferromagnets, electric current generally induces transverse Hall voltage in proportion to magnetization (anomalous Hall effect), and it is frequently used for electrical readout…
Full optimization of quasiharmonic free energy with anharmonic lattice model: Application to thermal expansion and pyroelectricity of wurtzite GaN and ZnO
Ryota Masuki, Takuya Nomoto, Ryotaro Arita +1
We present a theory and a calculation scheme of structural optimization at finite temperatures within the quasiharmonic approximation (QHA). The theory is based on an efficient sch…