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

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RESEARCH PRODUCT

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

R. Feile Gerhard Jakob H. Adrian R. Li E. Sherman

subject

Condensed matter physics Field (physics)Phonon Chemistry Superlattice media_common.quotation_subject Inorganic chemistry General Chemistry Condensed Matter Physics Asymmetry Symmetry (physics)Crystal symbols.namesake symbols General Materials Science Raman spectroscopy Raman scattering media_common

description

Abstract Raman results of ultrathin layer high Tc superlattices ( Y m Pr 1 )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.

year	journal	country	edition	language
1997-03-01	Journal of Physics and Chemistry of Solids

https://doi.org/10.1016/s0022-3697(96)00151-5

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