585 citations · 1.1k across the 46 of their papers we have counts for
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Bulk-edge correspondence in two-dimensional topological semimetals: A transfer matrix study of antichiral edge modes
Tomonari Mizoguchi, Tohru Koma
We study edge modes in topological semimetals which have an energy band structure of ordinary semimetals but can be characterized by a Chern number. More specifically, we focus on…
Quantization of Conductance in Quasi-Periodic Quantum Wires
Tohru Koma, Toru Morishita, Taro Shuya
We study charge transport in the Peierls-Harper model with a quasi-periodic cosine potential. We compute the Landauer-type conductance of the wire. Our numerical results show the f…
Detecting Gapless Excitations above Ferromagnetic Domain Walls
Tohru Koma, Masanori Yamanaka
In a two or three dimensional ferromagnetic XXZ model, a low energy excitation mode above a magnetic domain wall is gapless, whereas all of the usual spin wave excitations moving a…
Resistance Jumps and Hysteresis in Ferromagnetic Wires
Tohru Koma, Masanori Yamanaka
A phenomenological approach based on the principle of minimum heat generation is proposed for understanding experiments for metallic wires with a ferromagnetic domain wall controll…
Insensitivity of Quantized Hall Conductance to Disorder and Interactions
Tohru Koma
A two-dimensional quantum Hall system is studied for a wide class of potentials including single-body random potentials and repulsive electron-electron interactions. We assume that…
Spectral Gaps of Quantum Hall Systems with Interactions
Tohru Koma
A two-dimensional quantum Hall system without disorder for a wide class of interactions including any two-body interaction with finite range is studied by using the Lieb-Schultz-Ma…