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

被引：36

作者：

UHRIG, GS

VLAMING, R

机构：

[1] Institut für Theoretische Physik C, Technische Hochschule Aachen

来源：

PHYSICAL REVIEW LETTERS | 1993年 / 71卷 / 02期

关键词：

D O I：

10.1103/PhysRevLett.71.271

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

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 incommensurate values of k thus masking a region of phase separation including a tricritical point. In this region a new phase must exist. Its structure is still unknown in spite of the simplicity of the model. We compare our finding to results for other interacting fermion systems and discuss its possible relation to superconductivity.

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页码：271 / 274

页数：4

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