Electron-electron interaction in superconducting Lithium under pressure

ORAL

Abstract

Lithium is known to exist in different phases and to uperconduct under pressure (P). We investigate ~the screened electron-electron interaction in Li as a function of P by analyzing the dielectric band structures of several phases. These band structures are obtained by iterative diagonalization\footnote{H.Wilson, F.Gygi and G.Galli, Phys. Rev. B, 78,113303 (2008); Hugh F. Wilson, Deyu Lu, Francois Gygi Phys. Rev. B. 79, 245106 (2009).} of the dielectric matrix as a function of wave vector and frequency. Even though the superconductivity in lithium is electron-phonon mediated, lithium is a good test system to study the screened e-e interaction more generally, which might be a primary mechanism for the superconductivity in high T$_{c}$ nitrides of the form MNCl (M=Ti,Zr,Hf).

*Work supported by Grant \# DE-FC02-06ER25777.

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Authors

  • Amandeep Kaur

  • Erik Ylvisaker

    • University of California, Davis

  • Deyu Lu

    • Brookhaven National Laboratory
    • Center for Functional Nanomaterials, Brookhaven National Laboratory

  • Yan Li

    • Brookhaven National Laboratory

  • Giulia Galli

    • University of California, Davis
    • Department of Chemistry and Department of Physics, University of California at Davis, Davis, California, USA
    • Department of Chemistry \& Department of Physics, Unversity of California, Davis
    • Department of Chemistry and Department of Physics, UC Davis
    • UC Davis
    • University of California-Davis
    • Department of Chemistry and Department of Physics, University of California, Davis
    • Univeristy of California, Davis
    • University of California Davis, Davis, CA95616
    • University of California, Davis, USA

  • Warren Pickett

    • University of California Davis
    • UC Davis, Dept of Physics
    • University of California, Davis