New Type of Degenerate Quantum Spin Phase
Strongly Correlated Electrons
2007-05-23 v1 Statistical Mechanics
Abstract
Correlated electrons often crystalize to the Mott insulator usually with some magnetic orders, whereas the "quantum spin liquid" has been a long-sought issue. We report numerical evidences that a nonmagnetic insulating (NMI) phase gets stabilized near the Mott transition with remarkable properties: The 2D Mott insulators on geometrically frustrated lattices contain a phase with gapless spin excitations and degeneracy of the ground state in the whole Brillouin zone of the total momentum. It has an interpretation for an unexplored type of a quantum liquid. The present concept is useful in analyzing a variety of experimental results in frustrated magnets including organic BEDT-TTF compounds.
Cite
@article{arxiv.cond-mat/0307022,
title = {New Type of Degenerate Quantum Spin Phase},
author = {Masatoshi Imada and Takahiro Mizusaki and Shinji Watanabe},
journal= {arXiv preprint arXiv:cond-mat/0307022},
year = {2007}
}
Comments
5 pages (6 figures included)