Inhibition of phase separation and appearance of new phases for interacting spinless fermions

G. S. Uhrig and Ruud Vlaming
Phys. Rev. Lett. 71, 271 – Published 12 July 1993
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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 χ(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.

  • Received 29 March 1993

DOI:https://doi.org/10.1103/PhysRevLett.71.271

©1993 American Physical Society

Authors & Affiliations

G. S. Uhrig and Ruud Vlaming

  • Institut für Theoretische Physik C, Technische Hochschule Aachen, D-5100 Aachen, Germany

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Vol. 71, Iss. 2 — 12 July 1993

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