Year: 2003
Type: article
Abstract: We analyze the strong-coupling limit of spin-one bosons in low-dimensional lattices. In one-dimensional lattices, for an odd number of bosons per site ( N 0 = 2 k + 1), the ground state is a dimerized-valence-bond crystal with a twofold degeneracy; the low-lying elementary spin excitations carry spin-one. For an even number of bosons per site ( N 0 = 2 k ), the ground state is a nondegenerate spin singlet Mott state. We also argue that for square lattices in a quantum spin disordered limit, ground states should be dimerized-valence-bond crystals for an odd integer N 0 . Finally, we briefly report results on exotic states for non-integer numbers of bosons per site in one-dimensional lattices.
Source: Europhysics Letters (EPL)
Author: F Zhou
Institution: Utrecht University
Language: English
Subfield: Atomic and Molecular Physics, and Optics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: bronze
OpenAlex ID: W1998368648