45 citations · 391 across the 32 of their papers we have counts for
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Quasi-fractionalization of spin in a cluster-based Haldane state supported by chirality of a triangular spin tube
Takanori Sugimoto, Takami Tohyama
Fractionalization of quantum degrees of freedom holds the key to finding new phenomena in physics, e.g., the quark model in hadron physics, the spin-charge separation in strongly-c…
Coexistence of Strong and Weak Majorana Zero Modes in Anisotropic XY Spin Chain with Second-Neighbor Interaction
Kazuhiro Wada, Takanori Sugimoto, Takami Tohyama
We theoretically investigate Majorana zero modes emerging in an anisotropic XY spin chain with second neighbor interactions. The spin chain is mathematically equivalent to the Kita…
Mean-field study of the Bose-Hubbard model in Penrose lattice
Rasoul Ghadimi, Takanori Sugimoto, Takami Tohyama
We examine the Bose-Hubbard model in the Penrose lattice based on inhomogeneous mean-field theory. Since averaged coordination number in the Penrose lattice is four, mean-field pha…
Magnetic excitations in magnetization plateaux of a frustrated spin ladder
Kota Sasaki, Takanori Sugimoto, Shigetoshi Sota +1
Magnetization plateaux emerging in quantum spin systems due to spontaneously breaking of translational symmetry have been reported both theoretically and experimentally. The broken…
Magnetic orders induced by RKKY interaction in Tsai-type quasicrystalline approximant Au-Al-Gd
Haruka Miyazaki, Takanori Sugimoto, Katsuhiro Morita +1
Recent experimental study on Tsai-type quasicrystalline approximant Au-Al-Gd has revealed the presence of magnetic orders and phase transitions with changing the Au/Al concentratio…
Cluster-Based Haldane States in Spin-1/2 Cluster Chains
Takanori Sugimoto, Katsuhiro Morita, Takami Tohyama
The Haldane state is a typical quantum and topological state of matter, which exhibits an edge state corresponding to symmetry-protected topological order in a one-dimensional inte…