FINITE-TEMPERATURE RESULTS FROM CONSTRAINED FERMIONIZATION IN THE 2-DSPIN 1 2 HEISENBERG-ANTIFERROMAGNET .1. THE NEEL PHASE/

Authors
DISTASIO M TAGLIACOZZO A ERCOLESSI E MORANDI G
Citation
M. Distasio et al., FINITE-TEMPERATURE RESULTS FROM CONSTRAINED FERMIONIZATION IN THE 2-DSPIN 1 2 HEISENBERG-ANTIFERROMAGNET .1. THE NEEL PHASE/, International journal of modern physics b, 8(6), 1994, pp. 741-756
Citations number
18
Categorie Soggetti
Physics, Condensed Matter","Physycs, Mathematical","Physics, Applied
Journal title
International journal of modern physics b → ACNP
ISSN journal
02179792
Volume
8
Issue
6
Year of publication
1994
Pages
741 - 756
Database
ISI
SICI code
0217-9792(1994)8:6<741:FRFCFI>2.0.ZU;2-D
Abstract
The antiferromagnetic saddle point is studied up to one-loop correctio ns, including, within the same approximation, the constraint of single site occupancy in the fermionization procedure, at all temperatures. The resulting spin wave spectrum and zero point fluctuations are the s ame as those of the spin wave theory. The effect of the constraint on the temperature dependence of the specific heat is discussed.