MAGNETIC PHASE-DIAGRAM OF THE HUBBARD-MODEL IN 3 DIMENSIONS - THE 2ND-ORDER LOCAL APPROXIMATION

Authors
TAHVILDARZADEH AN FREERICKS JK JARRELL M
Citation
An. Tahvildarzadeh et al., MAGNETIC PHASE-DIAGRAM OF THE HUBBARD-MODEL IN 3 DIMENSIONS - THE 2ND-ORDER LOCAL APPROXIMATION, Physical review. B, Condensed matter, 55(2), 1997, pp. 942-946
Citations number
11
Categorie Soggetti
Physics, Condensed Matter
Journal title
Physical review. B, Condensed matter → ACNP
ISSN journal
01631829
Volume
55
Issue
2
Year of publication
1997
Pages
942 - 946
Database
ISI
SICI code
0163-1829(1997)55:2<942:MPOTHI>2.0.ZU;2-9
Abstract
local, second-order (truncated) approximation is applied to the Hubbar d model in three dimensions. Lowering the temperature, at half-filling , the paramagnetic ground state becomes unstable towards the formation of a commensurate spin-density-wave (SDW) state (antiferromagnetism) and sufficiently far away from half-filling towards the formation of i ncommensurate SDW states. The incommensurate-ordering wave vector does not deviate much from the commensurate one, which is in accordance wi th the experimental data for the SDW in chromium alloys.