Confined and extended optical phonons in an ultrathin-layer YBa2Cu3O7/PrBa2Cu3O7 superlattice
Phys. Rev. B. Bd. 51. 1995 S. 1322 - 1325
Erscheinungsjahr: 1995
Publikationstyp: Zeitschriftenaufsatz (Forschungsbericht)
Sprache: Englisch
Doi/URN: 10.1103/PhysRevB.51.1322
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Inhaltszusammenfassung
Raman-scattering studies of a high-quality ultrathin-layer (YBa2Cu3O7)4/(PrBa2Cu3O7)1 superconducting superlattice resolve, in addition to the combined B1u mode at 310 cm-1 previously reported for a 2:1 sample, a peak at 350 cm-1 at low temperature. This peak and also others have been interpreted by a lattice-dynamical calculation for the superlattice. The results are compared with confined or extended phonon pictures. The superlattice mode is not renormalized below the superconducting transi...Raman-scattering studies of a high-quality ultrathin-layer (YBa2Cu3O7)4/(PrBa2Cu3O7)1 superconducting superlattice resolve, in addition to the combined B1u mode at 310 cm-1 previously reported for a 2:1 sample, a peak at 350 cm-1 at low temperature. This peak and also others have been interpreted by a lattice-dynamical calculation for the superlattice. The results are compared with confined or extended phonon pictures. The superlattice mode is not renormalized below the superconducting transition temperature.» weiterlesen» einklappen
Autoren
Klassifikation
DFG Fachgebiet:
Physik der kondensierten Materie
DDC Sachgruppe:
Physik
