Generalized flux phases for the t-J model: A variational Monte Carlo study

Shoudan Liang and Nandini Trivedi
Phys. Rev. Lett. 64, 232 – Published 8 January 1990
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Abstract

We calculate the energy of flux states described by Slater determinants of single-particle levels in a uniform magnetic field with p/q flux quanta per plaquette and with no double occupancy. We find the exchange energy of flux states is lower than that of the Gutzwiller wave function by 10%20%. The minimum kinetic energy is obtained by introducing phases associated with the holes. The phases are calculated by mapping onto a classical frustrated XY model. At 10% doping, the 1/2 flux state (π phase) is stabilized for the parameter regime J/t≳0.2. At about 20% doping, the time-reversal-breaking (1/3 flux state has the lowest energy for J/t≳1.0.

  • Received 23 August 1989

DOI:https://doi.org/10.1103/PhysRevLett.64.232

©1990 American Physical Society

Authors & Affiliations

Shoudan Liang and Nandini Trivedi

  • Department of Physics, University of Illinois at Urbana-Champaign, 1110 West Green Street, Urbana, Illinois 61801

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Issue

Vol. 64, Iss. 2 — 8 January 1990

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