Anomalous self-energy effects of the B1g phonon in Y1-x(Pr, Ca)xBa2Cu3O7 films

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Erscheinungsjahr:
1999
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  • In Raman spectra of cuprate superconductors the gap shows up both directly, via a redistribution of the electronic background, the so-called “2Δ peaks,” and indirectly, e.g., via the renormalization of phononic excitations. We use a model that allows us to study the redistribution and the related phonon self-energy effects simultaneously. We apply this model to the B1g phonon of Y1-x(Pr, Ca)xBa2Cu3O7 films, where Pr or Ca substitution enables us to investigate under- and overdoped samples. While various self-energy effects can be explained by the strength and energy of the 2Δ peaks, anomalies remain. We discuss possible origins of these anomalies. © 1999 The American Physical Society.
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  • info:eu-repo/semantics/closedAccess
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Forschungsinformationssystem der UHH
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oai:www.edit.fis.uni-hamburg.de:publications/4be569b5-e0b6-46de-98af-bd85714b664d