Observation of superconductivity-induced phonon frequency changes in the organic superconductor κ-(BEDT-TTF)2Cu(NCS)2

L. Pintschovius, H. Rietschel, T. Sasaki, H. Mori, S. Tanaka, N. Toyota, M. Lang, F. Steglich

Research output: Contribution to journalArticlepeer-review

40 Citations (Scopus)

Abstract

Frequencies of transverse acoustic phonons were measured by inelastic neutron scattering on single crystals of the organic superconductor κ-(BEDT-TTF)2Cu(NCS)2. Significant frequency changes were observed for phonon energies close to the superconducting energy gap 2Δ on cooling the sample below the superconducting transition temperature Tc = 9.15 K. The observed relative shifts are large compared to those in the classical superconductor Nb and also larger than the shifts found recently in the high-Tc superconductor YBa2Cu3O7.

Original languageEnglish
Pages (from-to)627-632
Number of pages6
JournalEurophysics Letters
Volume37
Issue number9
DOIs
Publication statusPublished - 1997 Mar 20

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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