Title

Spectral Properties of a Doped Antiferromagnet with Pairing Correlations

Authors

Authors

V. M. Loktev;V. Turkowski

Comments

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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

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