Electron-phonon coupling in {kappa}-(BEDT-TTF){sub 2}Cu(NCS){sub 2} organic superconductor studied by Raman scattering spectroscopy.

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Low frequency Raman data for {kappa}-(ET){sub 2}Cu(NCS){sub 2}(T{sub c} = 10.4 K) are reported. Measurements have been performed in a wide range of temperatures (1.5-100 K) and frequency hardening related to the superconducting transition has been observed for all the low-lying coupled phonons. The measured relative frequency shifts are lower than those previously reported for {kappa}-(ET){sub 2}Cu[N(CN){sub 2}]Br (T{sub c} = 11.67 K), but the behavior of the two systems is similar and indicates a significant strength of the intermolecular electron-photon coupling. The effects of isotopic substitutions ({sup 13}C{sub 4} {sup 34}S{sub 8} and {sup 2}H{sub 8}) in ET molecules ... continued below

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6 p.

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Pedron, D. July 31, 1998.

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Low frequency Raman data for {kappa}-(ET){sub 2}Cu(NCS){sub 2}(T{sub c} = 10.4 K) are reported. Measurements have been performed in a wide range of temperatures (1.5-100 K) and frequency hardening related to the superconducting transition has been observed for all the low-lying coupled phonons. The measured relative frequency shifts are lower than those previously reported for {kappa}-(ET){sub 2}Cu[N(CN){sub 2}]Br (T{sub c} = 11.67 K), but the behavior of the two systems is similar and indicates a significant strength of the intermolecular electron-photon coupling. The effects of isotopic substitutions ({sup 13}C{sub 4} {sup 34}S{sub 8} and {sup 2}H{sub 8}) in ET molecules on the low frequency Raman active phonons of {kappa}-(ET{sub 2}Cu(NCS){sub 2}) are also reported. They give the first direct experimental confirmation to the suggested lattice softening induced by deuteration.

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6 p.

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OSTI as DE00010909

Medium: P; Size: 6 pages

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  • International Conference on Science and Technology of Synthetic Metals, Montpellier (FR), 07/12/1998--07/18/1998

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  • Report No.: ANL/CHM/CP-96970
  • Grant Number: W-31109-ENG-38
  • Office of Scientific & Technical Information Report Number: 10909
  • Archival Resource Key: ark:/67531/metadc621919

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  • July 31, 1998

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  • June 16, 2015, 7:43 a.m.

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  • April 11, 2017, 1:03 p.m.

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Pedron, D. Electron-phonon coupling in {kappa}-(BEDT-TTF){sub 2}Cu(NCS){sub 2} organic superconductor studied by Raman scattering spectroscopy., article, July 31, 1998; Illinois. (digital.library.unt.edu/ark:/67531/metadc621919/: accessed November 18, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.