Ground-State Phase Diagrams of the Two-Dimensional Quantum Heisenberg Spin Glass Models

@article{Nonomura1995GroundStatePD,
title={Ground-State Phase Diagrams of the Two-Dimensional Quantum Heisenberg Spin Glass Models},
author={Y. Nonomura and Y. Ozeki},
journal={Journal of the Physical Society of Japan},
year={1995},
volume={64},
pages={2710-2713}
}

Ground-state properties of the two-dimensional S =1/2 random Heisenberg models are investigated by the exact-diagonalization method. The phase diagram of the bond-random model (the ± J model) is the same as that of the corresponding Ising spin glass model, in spite of quantum fluctuation. In the site-random model, the spin glass phase exists at least in the ferro-rich case. In comparison with the corresponding Ising model, the Neel phase of this model becomes much narrower in the ferro-rich… CONTINUE READING