Fermion zero mode and superfluid weight

Details Fermion zero mode and superfluid weight Fermion zero mode and superfluid weight

2008-04-02

arxiv.org/abs/0804.0416v3

J. Phys. Soc. Jpn., Vol.78, No.3, 034713 (2009)

Physics

Condensed Matter

Strongly Correlated Electrons

Scientific paper

10.1143/JPSJ.78.034713

We propose one possible mechanism for deconfinement based on an SU(2) slave-boson theory. Resorting to an effective field theory approach, we show that introduction of an isospin interaction potential gives rise to a fermion zero mode in an instanton-hedgehog configuration. As a result, meron-type vortices are allowed. We demonstrate how emergence of such vortices results in the doping-independent decreasing ratio of superfluid weight.

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