Non-Fermi liquid from confinement in doped Mott insulators

Details Non-Fermi liquid from confinement in doped Mott insulators Non-Fermi liquid from confinement in doped Mott insulators

2009-12-09

arxiv.org/abs/0912.1684v1

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages and 2 figures

Scientific paper

A phenomenological description for confinement of fractionalized excitations is proposed in the gauge theory approach for doped Mott insulators. Introducing the Polyakov-loop parameter into an SU(2) gauge theory for the t-J model, we show that electron excitations emerge below the so-called coherence temperature, resulting from confinement of spinons and holons via the formation of the Polyakov loop. Remarkably, such confined electrons turn out to exhibit non-Fermi liquid physics without quantum criticality, yielding the electric resistivity in quantitative agreement with experimental data. The Higgs phase is not allowed due to confinement, suggesting a possible novel mechanism of superconductivity in the strong coupling approach.

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