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

doi:10.1209/epl/i1997-00202-4

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

Institute for Materials Research (IMR) (institute affiliation only)

Research output: Contribution to journal › Article › peer-review

46 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 T_c = 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-T_c superconductor YBa₂Cu₃O₇.

Original language	English
Pages (from-to)	627-632
Number of pages	6
Journal	EPL
Volume	37
Issue number	9
DOIs	https://doi.org/10.1209/epl/i1997-00202-4
Publication status	Published - 1997 Mar 20

ASJC Scopus subject areas

Physics and Astronomy(all)

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

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.",

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T1 - Observation of superconductivity-induced phonon frequency changes in the organic superconductor κ-(BEDT-TTF)2Cu(NCS)2

AU - Pintschovius, L.

AU - Rietschel, H.

AU - Sasaki, T.

AU - Mori, H.

AU - Tanaka, S.

AU - Toyota, N.

AU - Lang, M.

AU - Steglich, F.

PY - 1997/3/20

Y1 - 1997/3/20

N2 - 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.

AB - 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.

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

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