Bond-operator mean-field theory of the half-filled Kondo lattice model - art. no. 092406

Authors
Jurecka, C Brenig, W
Citation
C. Jurecka et W. Brenig, Bond-operator mean-field theory of the half-filled Kondo lattice model - art. no. 092406, PHYS REV B, 6409(9), 2001, pp. 2406
Citations number
20
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
PHYSICAL REVIEW B
ISSN journal
01631829 → ACNP
Volume
6409
Issue
9
Year of publication
2001
Database
ISI
SICI code
0163-1829(20010901)6409:9<2406:BMTOTH>2.0.ZU;2-V
Abstract
We present a bond-operator mean-field theory for the Kondo lattice model at half filling in two and three dimensions (3D). A continuous quantum phase transition from an antiferromagnetic to a spin-gapped singlet ground state is found at J/t = 1.505 (1.833) in 2D (3D). Additionally we evaluate the qu asiparticle dispersions as well as the staggered magnetic moment and provid e a comparison with complementary numerical approaches.