Anomaly at Deltak in the ARPES spectrum of dirty superconductors
T. Dahm, P. J. Hirschfeld, L. Zhu, D. J. Scalapino
Abstract
Elastic forward scattering can lead to an anomaly in the ARPES spectrum of the cuprate superconductors. Here we discuss how this anomaly can be used to provide a measurement of the superconducting gap Deltak for k values away from the Fermi surface.
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