ISSN:
1434-6036
Keywords:
PACS. 75.10.Jm Quantized spin models - 11.30.-j Symmetry and conservation laws - 75.40.Mg Numerical simulation studies
Source:
Springer Online Journal Archives 1860-2000
Topics:
Physics
Notes:
Abstract: In order to understand the properties of Mott insulators with strong ground state orbital fluctuations, we study the zero temperature properties of the SU(4) spin-orbital model on a square lattice. Exact diagonalizations of finite clusters suggest that the ground state is disordered with a singlet-multiplet gap and possibly low-lying SU(4) singlets in the gap. An interpretation in terms of plaquette SU(4) singlets is proposed. The implications for LiNiO2 are discussed.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/PL00011085
Permalink