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

, , , , , , and

1997 EDP Sciences
, , Citation L. Pintschovius et al 1997 EPL 37 627 DOI 10.1209/epl/i1997-00202-4

Download Article PDF

Article metrics

318 Total downloads

Share this article

Author affiliations

1 Forschungszentrum Karlsruhe, Institut für Nukleare Festkörperphysik, P. O. Box 3640, D-76021 Karlsruhe, Germany

2 Institut for Materials Research, Tohoku University, Katahira 2-1-1, Aobaku, Sendai 980, Japan

3 International Superconductivity Technology Center, Shinonome 1-10-13, Kotoku, Tokyo 135, Japan

4 Institute for Advanced Science and Technology - Gakuen-cho 1-2, Sakai 593, Japan

5 Institut für Festkörperphysik, SFB 252, Hochschulstraße 8, D-64289 Darmstadt, Germany

6 Max-Planck-Institut für chemische Physik fester Stoffe, D-01187 Dresden, Germany

Dates

  1. Received 21 August 1996
  2. Accepted 18 February 1997
Journal RSS
Sign up for new issue notifications
0295-5075/37/9/627

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.

Export citation and abstract BibTeX RIS

Previous article in issue
Next article in issue
10.1209/epl/i1997-00202-4