Document Type

Article

Publication Date

4-2001

Journal or Book Title

Physical Review B

Volume

63

First Page

1

Last Page

4

DOI

10.1103/PhysRevB.63.212501

Abstract

In angle-resolved photoelectron spectra of the antiferromagnetic insulators Ca2CuO2Cl2 and Sr2CuO2Cl2, a sharp drop of the spectral intensity of the lowest-lying band is observed along a line in k space equivalent to the Fermi surface of the optimally doped high-temperature superconductors. This was interpreted as a signature of the existence of a remnant Fermi surface in the insulating phase of the high-temperature superconductors. In this paper it is shown that the drop of the spectral intensity is not related to the spectral function but is a consequence of the electron-photon matrix element.

Comments

This article is from Physical Review B 63 (2001): 212501, doi:10.1103/PhysRevB.63.212501. Posted with permission.

Copyright Owner

The American Physical Society

Language

en

File Format

application/pdf

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