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초록
A detailed study has been made of electron Raman scattering in superconducting and insulating single crystals of YBa2Cu3 O6+x. The spectral changes which occur at frequencies omega < 600 cm-1, on the one hand, and the different positions of the 2DELTA peak in different polarizations, on the other hand, indicate that the superconducting gap is strongly anisotropic. In the normal phase the behavior of the imaginary part of the response function R''(omega) in the polarization (x'x') corresponds to the model of a marginal Fermi liquid. In the polarization (x'y'), this behavior is independent of the temperature. In insulating crystals, R''(omega) is independent of the temperature up to T greater than or similar to 200 K in both polarizations.
키워드
LIGHT; STATE
- 제목
- Temperature dependence of electron Raman scattering in superconducting and insulating YBa2Cu306+x single crystals
- 저자
- MAKSIMOV, AA; PUCHKOV, AV; TARTAKOVSKII, II; REZNIK, D; KLEIN, MV; Lee W. C.; GINSBERG, DM
- 발행일
- 1992-12
- 저널명
- JETP Letters
- 권
- 56
- 호
- 11
- 페이지
- 570 ~ 574