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Mean-field theory for the t-J model

C. Jayaprakash, H. R. Krishnamurthy, and Sanjoy Sarker
Phys. Rev. B 40, 2610(R) – Published 1 August 1989
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Abstract

We present a new mean-field theory for the t-J model using a representation in which singly occupied sites or spins are represented by bosons and empty sites or holes by fermions. We obtain a phase diagram which includes ferromagnetic, antiferromagnetic, spiral (with the pitch inversely proportional to the density of holes), and disordered spin-liquid phases, with a clear separation of charge and spin excitations. We comment on the conditions for obtaining superconductivity in the model.

  • Received 14 April 1989

DOI:https://doi.org/10.1103/PhysRevB.40.2610

©1989 American Physical Society

Authors & Affiliations

C. Jayaprakash

  • Department of Physics, The Ohio State University, Columbus, Ohio 43210

H. R. Krishnamurthy

  • Joseph Henry Laboratories of Physics, Princeton University, Princeton, New Jersey 08544

Sanjoy Sarker

  • Department of Physics, University of Alabama, Tuscaloosa, Alabama 35487

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Vol. 40, Iss. 4 — 1 August 1989

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