Evidence from tunneling spectroscopy for a quasi-one-dimensional origin of superconductivity in Sr$_2$RuO$_4$

ORAL

Abstract

To establish the mechanism of unconventional superconductivity in Sr$_2$RuO$_4$, a prerequisite is direct information concering the momentum-space structure of the energy gaps $\Delta_i(k)$, and in particular whether the pairing strength is stronger (``dominant'') on the quasi-one-dimensional ($\alpha$ and $\beta$) or on the quasi-two-dimensional ($\gamma$) Fermi surfaces. We present scanning tunneling spectroscopy measurements of the density of states spectra in the superconducting state of Sr$_2$RuO$_4$ for $0.1 T_c

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Authors

  • S. Lederer

    • Stanford University

  • I.A. Firmo

    • Cornell University, Brookhaven National Laboratory

  • C. Lupien

    • University of Sherbrooke

  • A.P. Mackenzie

    • University of St. Andrews, Mac Planck Institute for Chemical Physics of Solids

  • J.C. Davis

    • Cornell University, Brookhaven National Laboratory, University of St. Andrews

  • S.A. Kivelson

    • Stanford University