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Elsevier, Journal of Physics and Chemistry of Solids, 3(58), p. 379-383

DOI: 10.1016/s0022-3697(96)00151-5

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An interface effect in c-oriented (Y/Pr)Ba2Cu3O7 Superlattices: Raman scattering by ‘Forbidden’ phonons

Journal article published in 1997 by R. Li, R. Feile, E. Sherman, Hermann Adrian, Gerhard Jakob ORCID
This paper is available in a repository.
This paper is available in a repository.

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Abstract

Raman results of ultrathin layer high Tc superlattices (Ym/Pr1)Ba2Cu3O7 (m = 2, 3, 4) exhibit a common feature: new peaks, absent in the bulk compounds. These peaks are attributed to oxygen B1u symmetry modes confined in the YBa2Cu3O7 layers. To explain their Raman activity a mechanism based on the asymmetry of crystal field at Y-Pr layer interfaces is proposed.