Berezinskii-Kosterlitz-Thouless Transition in Spin-Charge Separated Superconductor
Abstract
A model for spin-charge separated superconductivity in two dimensions is introduced where the phases of the spinon and holon order parameters couple gauge-invariantly to a statistical gauge-field representing chiral spin-fluctuations. The model is analyzed in the continuum limit and in the low-temperature limit. In both cases we find that physical electronic phase correlations show a superconducting-normal phase transition of the Berezinskii-Kosterlitz-Thouless type, while statistical gauge-field excitations are found to be strictly gapless. The normal-to-superconductor phase boundary for this model is also obtained as a function of carrier density, where we find that its shape compares favorably with that of the experimentally observed phase diagram for the oxide superconductors.
Cite
@article{arxiv.cond-mat/9403003,
title = {Berezinskii-Kosterlitz-Thouless Transition in Spin-Charge Separated Superconductor},
author = {J. P. Rodriguez},
journal= {arXiv preprint arXiv:cond-mat/9403003},
year = {2009}
}
Comments
35 pages, TeX, CSLA-P-93-2