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Photo-induced optical phonon frequency shift in YBa2Cu3O6.25

Authors
Journal
Physica C Superconductivity
0921-4534
Publisher
Elsevier
Publication Date
Identifiers
DOI: 10.1016/0921-4534(94)91804-x
Disciplines
  • Chemistry

Abstract

Abstract Using Raman spectroscopy, we measured the phonon frequency shift of the apical O vibration in insulating YBa 2Cu 3O 6.25 as a function of photo-induced doping. We excited samples with short high peak power laser pulses to produce charge carrier concentrations comparable to those obtained by chemical doping. Measurements showed that the photo-induced frequency shift of apical O phonon frequency is much smaller than the frequency shift produced by bulk heating or chemical doping indicating the importance of surrounding lattice ions on the apical O potential.

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