Understanding the totally symmetric intramolecular vibrations in $\kappa$-phase organic superconductors

ORAL

Abstract

We report magneto-infrared measurements of three quasi- isostructural $\kappa$-phase organic molecular solids: $\kappa$-(ET)$_2$Cu[N(CN)$_2$]Br (T$_c$=11.6 K), $\kappa$-(ET)$_2$Cu(SCN)$_2$ (T$_c$=10.4 K), and the non-superconducting $\kappa$-(ET)$_2$Cu[N(CN)$_2$]Cl analog. Our results support the contributing role of electron-molecular vibrational coupling in the pairing mechanism of layered organic superconductors, and we identify the most important totally symmetric modes in $\kappa$-(ET)$_2$Cu[N(CN)$_2$]Br within the non-planar molecular building block picture.

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Authors

  • J.T. Haraldsen

    • University of Tennessee

  • R. Wesolowski

  • J. Cao

  • J.L. Musfeldt

    • University of Tennessee

  • I. Olejniczak

    • Polish Academy of Sciences

  • J. Choi

    • University of Tennessee

  • Y.J. Wang

    • Florida State University

  • J.A. Schlueter

    • Argonne National Laboratory