FLUCTUATIONS AROUND THE MAGNETIC AND NONMAGNETIC SADDLE-POINTS IN THE2-DIMENSIONAL SPIN-1 2 FRUSTRATED HEISENBERG-MODEL/

Authors
DISTASIO M ERCOLESSI E MORANDI G TAGLIACOZZO A
Citation
M. Distasio et al., FLUCTUATIONS AROUND THE MAGNETIC AND NONMAGNETIC SADDLE-POINTS IN THE2-DIMENSIONAL SPIN-1 2 FRUSTRATED HEISENBERG-MODEL/, Physical review. B, Condensed matter, 49(16), 1994, pp. 10908-10913
Citations number
24
Categorie Soggetti
Physics, Condensed Matter
Journal title
Physical review. B, Condensed matter → ACNP
ISSN journal
01631829
Volume
49
Issue
16
Year of publication
1994
Pages
10908 - 10913
Database
ISI
SICI code
0163-1829(1994)49:16<10908:FATMAN>2.0.ZU;2-2
Abstract
Fermionization of the spin operators is allowed only in the restricted Hilbert space of singly occupied sites. A method to implement this si ngle-site occupancy constraint is applied to the frustrated Heisenberg model. This method allows us to study either magnetic or nonmagnetic phases at finite temperatures. A quantitative estimate of the relative weight of quantum fluctuations around the disordered dimer phases and the antiferromagnetic phase is given.