t-J model in slave fermion formulation-holon-holon interactions

Tzanko Ivanov

Yongjun Liu, Jinming Dong, Chang-De Gong

The effective holon-holon interaction by exchanging the spinons in the resonating-valence bond model is derived by the slave-fermion method. The authors found that the interaction is attractive for the holon Cooper pair. Complexity due to Bose condensation of the spinons at T=0 has been discussed.

L. Bryja, E. Kolley, Winfried Kolley

Within the slave-boson approach to the t-J model of high-T c superconductivity, the vertex of the spinon-mediated holon-holon interaction is exploited in detail to find out the critical temperature of holon pairing.

D. Yoshioka

大二郎 吉岡

Jürg Martin Fröhlich, P. A. Marchetti

We extend Abelian and non-Abelian bosonization formulas found in a previous paper, in combination with coherent-state methods, to present a systematic derivation of the slave-fermion, slave-boson, and semion representations of the two-dimensional t-J model in path-integral form. The slave-fermion and slave-boson representations are shown to arise from two different gauge fixing constraints introduced in the path-integral representation of the bosonized t-J model. For each representation we discuss the approximations leading to a mean-field theory. In the mean-field theory based on the semion representation, the holons are shown to be ``Dirac semions.''