Published March 1996 | Version v1
Journal article

Charge transfer in high-Tc (Y/Pr)Ba2Cu3O7 superlattices

  • 1. Institut fuer Physik, Johannes-Gutenberg-Universitaet Mainz, D-55099 Mainz (Germany)
  • 2. Institut fuer Festkoerperphysik, Technische Hochschule Darmstadt, D-64289 Darmstadt (Germany)

Description

We comment on the charge-transfer model for the unique softening of the apex [O(4)] oxygen observed in Raman spectra of a- and c-oriented (YBa2Cu3O7)m(PrBa2Cu3O7)n superlattices presented in a recent paper by Ham et al. [Phys. Rev. B 50, 16598 (1994)]. We find the size of the charge transfer necessary for the observed shift too large to explain the observations. In addition, a conclusion about the unique behavior of both types of superlattices can only be drawn if the sample quality is properly considered. copyright 1996 The American Physical Society

Additional details

Publishing Information

Journal Title
Physical Review. B, Condensed Matter
Journal Volume
53
Journal Issue
10
Journal Page Range
p. 6836-6837.
ISSN
0163-1829
CODEN
PRBMDO