Breakdown of mode-mode coupling expansion for commensurate itinerant antiferromagnetism in two dimensions - art. no. 012403

Authors
Lercher, MJ Wheatley, JM
Citation
Mj. Lercher et Jm. Wheatley, Breakdown of mode-mode coupling expansion for commensurate itinerant antiferromagnetism in two dimensions - art. no. 012403, PHYS REV B, 6301(1), 2001, pp. 2403
Citations number
19
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
PHYSICAL REVIEW B
ISSN journal
01631829 → ACNP
Volume
6301
Issue
1
Year of publication
2001
Database
ISI
SICI code
0163-1829(20010101)6301:1<2403:BOMCEF>2.0.ZU;2-3
Abstract
We consider the mode-mode coupling theory of two-dimensional commensurate i tinerant antiferromagnets where Q spans the Fermi surface. It is shown that quantum (finite frequency) terms in the mode-mode coupling expansion are s ingular. The singularity is sufficiently strong that a mean-field-like quan tum critical point does not exist.