Z_2 Gauge Theory of Electron Fractionalization in the t,t'-J Model

Details Z_2 Gauge Theory of Electron Fractionalization in the t,t'-J Model Z_2 Gauge Theory of Electron Fractionalization in the t,t'-J Model

2004-02-04

arxiv.org/abs/cond-mat/0402114v2

Physics

Condensed Matter

Strongly Correlated Electrons

122pages, no figuresi; improved contents (david@sci.ccny.cuny.edu)

Scientific paper

We consider a strongly correlated "t,t'-J" spin model with a positive
uniaxial anisotropy. We show that in 2+1 dimensions, this model is equivalent
to spin-charge excitations coupled to Z_2 Ising gauge fields and not to a U(1)
gauge fields (as in the "t-J" model). As a result a phase of frozen Z_2 gauge
fluctuations is possible, giving rise to a spin-charge-separated liquid.

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