Spectral Properties of a Doped Antiferromagnet with Pairing Correlations

    Authors

    V. M. Loktev;V. Turkowski

    Comments

    Authors: contact us about adding a copy of your work at STARS@ucf.edu

    Abstract

    In this paper, we study the spectral properties of a phenomenological model for a weakly doped antiferromagnet. In this model, it is assumed that each carrier moves in one of the two sublattices where it was introduced. Such a situation corresponds to a case of underdoped high-temperature superconductors with the free carrier spectra maximum at k=(+/-pi/2,+/-pi/2) and with a four-pocket Fermi surface. We study the spectral properties of the model by taking into account both the fluctuations of the phases of the superconducting order parameter and spins of the antiferromagnetic background. It is shown that the hole spectral function and the density of states are strongly affected by these fluctuations. In particular, we argue that these fluctuations can be responsible for the temperature evolution of the Fermi pockets in cuprate superconductors.

    Journal Title

    Journal of Low Temperature Physics

    Volume

    154

    Issue/Number

    3-4

    Publication Date

    1-1-2009

    Document Type

    Article

    First Page

    117

    Last Page

    134

    WOS Identifier

    WOS:000262505100004

    ISSN

    0022-2291

    Share

    COinS