Quantum Melting of Magnetic Order due to Orbital Fluctuations
Strongly Correlated Electrons
2009-10-30 v1
Abstract
We have studied the phase diagram and excitations of the spin-orbital model derived for a three dimensional perovskite lattice, as in KCuF_3. The results demonstrate that the orbital degeneracy drastically increases quantum fluctuations and suppresses the classical long-range order near the multicritical point in the mean-field phase diagram. This generates a qualitatively new spin liquid, providing the first example of a valence bond ground state in three dimensions.
Keywords
Cite
@article{arxiv.cond-mat/9701098,
title = {Quantum Melting of Magnetic Order due to Orbital Fluctuations},
author = {Louis Felix Feiner and Andrzej M. Oles and Jan Zaanen},
journal= {arXiv preprint arXiv:cond-mat/9701098},
year = {2009}
}
Comments
4 pages, ReVTeX, 4 figures, submitted to Phys. Rev. Lett