Electron phonon interaction in the organic superconductors αt-(BEDT-TTF)2I3 and β-(BEDT-TTF)2IAuI
作者： T. Ludwig , D. Schweitzer , H.J. Keller
DOI: 10.1016/0038-1098(95)00575-7
关键词: Resonance 、 Atmospheric temperature range 、 Phonon 、 Condensed matter physics 、 Strong interaction 、 Inelastic scattering 、 Amplitude 、 Chemistry 、 Superconductivity 、 Raman spectroscopy
摘要: Abstract A study of the low energetic modes in resonance Raman spectra organic superconductors αt-(BEDT-TTF)2I3 (Tc=8 K) and β-(BEDT-TTF)2IAuI (Tc=4 temperature range 1.5 K–100 K was performed. In both materials, a vanishing phonon bands (at 32 cm−1 42 for at 27 33 β-(BEDT-TTF)2IAuI) is observed below Tc. For symmetric stretching mode I3-Anions 120 cm−1, no change Tc found. The explained Balseiro-Falicov model phonon-superconducting amplitude interaction due to strong superconducting gap some modes. addition, measurements on α- κ-(BEDT-TTF)2I3 are presented, indicating that around 30 librational BEDT-TTF molecules.
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