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Superconducting gap-symmetry from Bogoliubov quasiparticle interference analysis on Strontium Ruthenate

ORAL

Abstract

We study the effects of disorder in the superconducting state of Strontium Ruthenate (SRO). Using the T-matrix approach in conjunction with Bogoluibov-de-Gennes formalism, we evaluate the real-space continuum electronic density of states to compare with Scanning tunneling microscopy (STM) conductance map, and its Fourier transform to compare with Bogoliubov quasiparticle interference (BQPI) images, providing information about the momentum-resolved superconducting gap structure. In this context, we use different gap order parameters, as obtained within weak coupling spin-fluctuation theory in the work by Romer et al (PRL, 123.247001, 2019). We aim to address recent experimental data (PNAS 117(10): 5222-5227, 2020) that claim d_(x^2-y^2) symmetry of the order parameter to be the most consistent with the BQPI analysis for SRO gap-structure.

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Presenters

  • Shinibali Bhattacharyya

    University of Florida, Department of Physics, University of Florida

Authors

  • Shinibali Bhattacharyya

    University of Florida, Department of Physics, University of Florida

  • Marvin Mueller

    Ruhr-Universität Bochum, Ruhr Univ Bochum

  • Astrid Rømer

    Niels Bohr Institute, Univ of Copenhagen

  • Miguel Antonio D Sulangi

    University of Florida

  • Andreas Kreisel

    Universität Leipzig, Institute for Theoretical Physics, University of Leipzig, Institute for Theoretical Physics, Leipzig University, Institut für Theoretische Physik, Universität Leipzig, University of Leipzig

  • Ilya Eremin

    Ruhr-Universität Bochum, Ruhr Univ Bochum, Institut für Theoretische Physik, Ruhr-Universität Bochum; Institute of Physics, Kazan Federal University

  • Brian M Andersen

    Niels Bohr Institute, University of Copenhagen, Niels Bohr Institute, University of Copenhagen

  • Peter Hirschfeld

    University of Florida, Department of Physics, University of Florida, Physics, University of Florida, univ of Florida