INHIBITION OF PHASE-SEPARATION AND APPEARANCE OF NEW PHASES FOR INTERACTING SPINLESS FERMIONS

Authors
UHRIG GS VLAMING R
Citation
Gs. Uhrig et R. Vlaming, INHIBITION OF PHASE-SEPARATION AND APPEARANCE OF NEW PHASES FOR INTERACTING SPINLESS FERMIONS, Physical review letters, 71(2), 1993, pp. 271-274
Citations number
31
Categorie Soggetti
Physics
Journal title
Physical review letters → ACNP
ISSN journal
00319007
Volume
71
Issue
2
Year of publication
1993
Pages
271 - 274
Database
ISI
SICI code
0031-9007(1993)71:2<271:IOPAAO>2.0.ZU;2-0
Abstract
The phase diagram of spinless fermions with repulsive interaction on a hypercubic lattice is calculated analytically in infinite dimensions. For 0 < T < 0. 183 the susceptibility chi(k) diverges for incommensur ate values of k thus masking a region of phase separation including a tricritical point. In this region a new phase must exist. Its structur e is still unknown in spite of the simplicity of the model. We compare our finding to results for other interacting fermion systems and disc uss its possible relation to superconductivity.