Odd-frequency density waves: Non-Fermi-liquid metals with an order parameter

Article

关键词: INSULATOR-TRANSITION;    TRANSPORT;    SYSTEM;    B=0;   

DOI  :  10.1103/PhysRevB.64.035107

来源: SCIE

【 摘 要 】

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 that 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.

【 授权许可】

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