Phase separation in the <i>t</i>-<i>J</i> model

V. J. Emery; S. A. Kivelson; H. Q. Lin

doi:10.1103/PhysRevLett.64.475

Phase separation in the t-J model

V. J. Emery, S. A. Kivelson, and H. Q. Lin

Phys. Rev. Lett. 64, 475 – Published 22 January 1990

Abstract

It is shown that, for the t-J model, dilute holes in an antiferromagnet are unstable against phase separation into a hole-rich and a no-hole phase. When the spin-exchange interaction J exceeds a critical value $J_{c}$ , the hole-rich phase has no electrons. It is proposed that for J slightly less than $J_{c}$ the hole-rich phase is a low-density superfluid of electron pairs. A brief discussion of phase separation in other related models is given.

Received 20 October 1989

DOI:https://doi.org/10.1103/PhysRevLett.64.475

Authors & Affiliations

V. J. Emery, S. A. Kivelson, and H. Q. Lin

Department of Physics, Brookhaven National Laboratory, Upton, New York 11973 and Department of Physics, University of California–Los Angeles, Los Angeles, California 90024