中国物理B ›› 1995, Vol. 4 ›› Issue (11): 864-869.doi: 10.1088/1004-423X/4/11/011

• • 上一篇    

RAMAN SCATTERING OF ORGANIC CHARGE-TRANSFER SALTS CONTAINING BEDT-TTF CATION

刘道志   

  1. Analysis Center, Tianljin University, Tianjin 300072, China
  • 收稿日期:1995-03-11 出版日期:1995-11-20 发布日期:1995-11-20
  • 基金资助:
    This project in the Exchange program between China and UK supported by the Royal Society.

RAMAN SCATTERING OF ORGANIC CHARGE-TRANSFER SALTS CONTAINING BEDT-TTF CATION

LIU DAO-ZHI (刘道志)a, W. HAYESb   

  1. a Analysis Center, Tianljin University, Tianjin 300072, China; b Clarendon Laboratory, Department of Physics, Oxford University, Oxford OX1 3PU, U.K.
  • Received:1995-03-11 Online:1995-11-20 Published:1995-11-20
  • Supported by:
    This project in the Exchange program between China and UK supported by the Royal Society.

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摘要： Raman scattering of several organic charge-transfer salts containing BEDT-TTF of ET cation such as κ-ET2Cu(NCS)2, βL-ET2I3, α-ET3Cl2. 2H2O, a-ET3 (ReO4)2 and ETFeBr4 were measured and the variations of the frequencies of C=C bonds of ET molecules on charge transfer were observed. It is found that the energy of C=C stretch modes shows a general downward shift upon ionisation of ET molecule. In addition, we have observed the Raman spectra of C=C stretch vibratinns in κ-ET2Cu(NCS)2 single crystal on going through Tc(～10.4 K) and found no detectable effect during the superconducting phase transition.

Abstract: Raman scattering of several organic charge-transfer salts containing BEDT-TTF of ET cation such as $\kappa$-ET2Cu(NCS)2, $\beta$L-ET2I3, $\alpha$-ET3Cl2. 2H2O, $\alpha$-ET3 (ReO4)2 and ETFeBr4 were measured and the variations of the frequencies of C=C bonds of ET molecules on charge transfer were observed. It is found that the energy of C=C stretch modes shows a general downward shift upon ionisation of ET molecule. In addition, we have observed the Raman spectra of C=C stretch vibratinns in $\kappa$-ET2Cu(NCS)2 single crystal on going through Tc(～10.4 K) and found no detectable effect during the superconducting phase transition.

中图分类号:  (Organic compounds, polymers)

  • 78.30.Jw
63.20.-e (Phonons in crystal lattices) 74.10.+v (Occurrence, potential candidates)