293 citations · 4.5k across the 188 of their papers we have counts for
6 papers · 1 filter
Density-matrix renormalization group study of optical conductivity of the Mott insulator for two-dimensional clusters
Kazuya Shinjo, Yoshiki Tamaki, Shigetoshi Sota +1
The real part of optical conductivity of the Mott insulators has a large amount of information on how spin and charge degrees of freedom interact with each other. B…
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…
Magnetic phase diagrams of the spin- Heisenberg model on a kagome-strip chain: Emergence of a Haldane phase
Katsuhiro Morita, Shigetoshi Sota, Takami Tohyama
Frustrated one-dimensional quantum spin systems are known to exhibit a variety of quantum ground states due to the effects of quantum fluctuations and frustrations. In a spin-1/2 k…
Multipolar nematic state of nonmagnetic FeSe based on the DFT+
Takemi Yamada, Takami Tohyama
Clarifying the origin of nematic state in FeSe is one of urgent problems in the field of iron-based superconductivity. Motivated by the discovery of a nematic solution in the densi…
High-harmonic generation approaching the quantum critical point of strongly correlated systems
Can Shao, Hantao Lu, Xiao Zhang +3
By employing the exact diagonalization method, we investigate the high-harmonic generation (HHG) of the correlated systems under the strong laser irradiation. For the extended Hubb…
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…