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51 papers · 1 filter
Correlation functions at the topological quantum phase transition in the S=1 XXZ chain with single-ion anisotropy
Toshiya Hikihara, Akira Furusaki
We study the one-dimensional S=1 XXZ spin model with single-ion anisotropy. It is known that at the transition points between the Haldane and large-D phases, the model exhibits a q…
Entanglement-based tensor-network strong-disorder renormalization group
Kouichi Seki, Toshiya Hikihara, Kouichi Okunishi
We propose an entanglement-based algorithm of the tensor-network strong-disorder renormalization group (tSDRG) method for quantum spin systems with quenched randomness. In contrast…
Magnetoelastic study on the frustrated quasi-one-dimensional spin-1/2 magnet LiCuVO
A. Miyata, T. Hikihara, S. Furukawa +3
We investigated the magnetoelastic properties of the quasi-one-dimensional spin-1/2 frustrated magnet LiCuVO. Longitudinal-magnetostriction experiments were performed at 1.5 K…
Frustration-induced quantum spin liquid behavior in the 1/2 random-bond Heisenberg antiferromagnet on the zigzag chain
Kazuki Uematsu, Toshiya Hikihara, Hikaru Kawamura
Recent studies have revealed that the randomness-induced quantum spin liquid (QSL)-like state is stabilized in certain frustrated quantum magnets in two and three dimensions. In or…
Tensor-network strong-disorder renormalization groups for random quantum spin systems in two dimensions
Kouichi Seki, Toshiya Hikihara, Kouichi Okunishi
Novel randomness-induced disordered ground states in two-dimensional (2D) quantum spin systems have been attracting much interest. For quantitative analysis of such random quantum…
Spin nematics in frustrated spin-dimer systems with bilayer structure
Toshiya Hikihara, Takahiro Misawa, Tsutomu Momoi
We study frustrated spin-1/2 dimer systems in two dimensions with a bilayer structure, where spins are ferromagnetically coupled in dimers. Our model includes frustrated two-spin e…