Odd-Frequency Density Waves: Non-Fermi-Liquid Metals with an Order Parameter

Details Odd-Frequency Density Waves: Non-Fermi-Liquid Metals with an Order Parameter Odd-Frequency Density Waves: Non-Fermi-Liquid Metals with an Order Parameter

2000-11-14

arxiv.org/abs/cond-mat/0011234v2

Physics

Condensed Matter

Strongly Correlated Electrons

References added, one footnote moved into the text

Scientific paper

10.1103/PhysRevB.64.035107

We consider states with a charge- or spin-density wave order parameter which is odd in frequency, so that the order parameter vanishes at zero frequency and there is a conventional Fermi surface. Such states break translational symmetry and, therefore, are not conventional Fermi liquids. In the odd-frequency spin-density wave case, there are Goldstone bosons and the low-energy spectrum is manifestly different from that of a Fermi liquid. We discuss a simple model which gives rise to such ordered states. The frequency-dependence of the gap leads to an unusual temperature dependence for various thermodynamic and transport properties, notably the resistivity.

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