Abstract
After a short review of the case for the t — J model as a suitable low energymodel Hamiltonian for CuO 2 planes in the high-Tc superconductors, the renormalized mean field approximation to this model is discussed. At half-filling the reduction to a Hilbert space containing only spin degrees of freedom leads to a wide class of degeneracies in the fermion meanfield description. One particular class of states which has generated much interest in the past year, is that built from one electron Hofstadter states which are eigenstates in the presence of a uniform magnetic flux. The mean field theory of such states in a t — J model is reviewed followed by a discussion of their unusual properties. In conclusion, some comments on the relationship to anyon models and other open questions are given.
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Rice, T.M. (1990). Flux Phases in the t — J Model. In: Avishai, Y. (eds) Recent Progress in Many-Body Theories. Springer, Boston, MA. https://doi.org/10.1007/978-1-4615-3798-4_1
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