activity
20232025
collaborators

5 papers

cond-mat.str-el2025

Incommensurate quantum magnet based on 4f-electron in a zigzag spin-1/2 chain of YbCuS

T. Onimaru, Y. Ohmagari, S. Mizutani +8

We performed high-resolution powder neutron diffraction experiments and discovered an elliptic helical incommensurate magnetic structure in the semiconducting rare-earth magnet YbC…

cond-mat.str-el2024

Cluster-projected matrix product state: framework for engineering exact quantum many-body ground states in one and two dimensions

Hidehiro Saito, Chisa Hotta

We propose a framework to design concurrently a frustration-free quantum many-body Hamiltonian and its numerically exact ground states on a sufficiently large finite-size cluster i…

cond-mat.str-el2024

Phase diagram of the quantum spin-1/2 Heisenberg- model on a frustrated zigzag chain

Hidehiro Saito, Chisa Hotta

We investigate the quantum spin-1/2 zigzag chain with frustrated - Heisenberg interactions, incorporating additional off-diagonal exchange interactions known as the t…

cond-mat.str-el2024

Exact matrix product states at the quantum Lifshitz tricritical point in a spin-1/2 zigzag-chain antiferromagnet with anisotropic -term

Hidehiro Saito, Chisa Hotta

Quantum anisotropic exchange interactions in magnets can induce competitions between phases in a different manner from those typically driven by geometrically frustrated interactio…

cond-mat.str-el2023

Deriving quantum spin model for a zigzag-chain ytterbium magnet with anisotropic exchange interactions

Hidehiro Saito, Hiroki Nakai, Chisa Hotta

We derive a quantum spin Hamiltonian of the spin-1/2 zigzag chain realized in a rare earth ytterbium-based magnetic insulator, YbCuS2. This material undergoes a transition at 0.95K…