Microscopic models for fractionalized phases in strongly correlated systems

Details Microscopic models for fractionalized phases in strongly correlated systems Microscopic models for fractionalized phases in strongly correlated systems

2002-01-17

arxiv.org/abs/cond-mat/0201320v1

Phys. Rev. B 66, 205104 (2002)

Physics

Condensed Matter

Superconductivity

10 pages, 4 figures

Scientific paper

10.1103/PhysRevB.66.205104

We construct explicit examples of microscopic models that stabilize a variety of fractionalized phases of strongly correlated systems in spatial dimension bigger than one, and in zero external magnetic field. These include models of charge fractionalization in boson-only systems, and various kinds of spin-charge separation in electronic systems. We determine the excitation spectrum and show the consistency with that expected from field theoretic descriptions of fractionalization. Our results are further substantiated by direct numerical calculation of the phase diagram of one of the models.

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