90 citations · 507 across the 31 of their papers we have counts for
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Edge states of Spin-1/2 Two-Leg Ladder with Four-Spin Ring Exchange
Mitsuhiro Arikawa, Shou Tanaya, Isao Maruyama +1
A topological insulator and its spin analogue as a gapped spin liquid have characteristic low energy excitations (edge states) within the gap when the systems have boundaries. This…
Quantized Berry Phases of a Spin-1/2 Frustrated Two-Leg Ladder with Four-Spin Exchange
I. Maruyama, T. Hirano, Y. Hatsugai
A spin-1/2 frustrated two-leg ladder with four-spin exchange interaction is studied by quantized Berry phases. We found that the Berry phase successfully characterizes the Haldane…
Non-adiabatic effect on Laughlin's argument of the quantum Hall effect
I. Maruyama, Y. Hatsugai
We have numerically studied a non-adiabatic charge transport in the quantum Hall system pumped by a magnetic flux, as one of the simplest theoretical realizations of non-adiabatic…
Topological Aspects of Surface States in Semiconductors
Yoshihiro Kuge, Isao Maruyama, Yasuhiro Hatsugai
Topological aspects of surface states in semiconductors are studied by an adiabatic deformation which connects a realistic system and a decoupled covalent-bond model. Two topologic…