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Flux phases in the t-J model

by: Menke U. Ubbens, Patrick A. Lee
Physical Review B, Vol. 46, No. 13. (Oct 1992), pp. 8434-8439, doi:10.1103/physrevb.46.8434  Key: citeulike:8230414

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Abstract

We analyze a class of mean-field flux phases of the slave boson t-J model, and present a finite-temperature phase diagram. The mean-field theory arises from a decomposition of the four-fermion terms into exchange, pairing, and direct terms, using Hubbard-Stratonovich fields. We find numerically that at low doping staggered flux phases are energetically favorable over the d-wave-pairing state. Very close to half filling a π-flux phase becomes stable. The occurrence of flux phases suppresses the pairing gap transition temperature.


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