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Computation of Phonon-Mediated Resistivity in Sr2RuO4 from first principles

ORAL

Abstract

Because of its strong structural similarities to some high-Tc cuprates, Sr2RuO4 (SRO), a supposedly correlated superconductor, has attracted a lot of attention recently. Even though the discovery of superconductivity in SRO happened more than 20 years ago, the nature of the superconducting gap symmetry is still debated today. SRO also bears other unconventional properties like a strong anisotropy of the temperature dependence of its resistivity. Indeed, at low temperature, resistivity behaves like a highly anisotropic 3D Fermi-liquid, but low metallic transport has been reported for the in-plane resistivity at high temperature while the out-of-plane resistivity possesses a transition from metallic to incoherent transport mechanism around 130K which remains unexplained. In order to shed light on these phenomena, we carried out ab initio calculations to compute the electron-phonon coupling in SRO in the framework of density functional theory as implemented in the Quantum ESPRESSO suite. Then, using the EPW module, we report the temperature dependent phonon-mediated resistivity of SRO as computed from the Iterative Boltzmann Transport Equation scheme.

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Presenters

  • Felix Antoine Goudreault

    Universite de Montreal

Authors

  • Felix Antoine Goudreault

    Universite de Montreal

  • Samuel Ponce

    Institute of Materials, École Polytechnique Fédérale de Lausanne, Ecole Polytechnique Federale de Lausanne

  • Feliciano Giustino

    Physics, University of Texas at Austin, University of Texas at Austin, Oden Institute for Computational Engineering and Sciences, University of Texas at Austin, Department of Physic, The University of Texas at Austin, Austin, Texas 78712, USA, Oden Institute for Computational Engineering and Sciences, Oden Institute, University of Texas at Austin, Department of Materials, University of Oxford, Department of Physics, University of Texas at Austin, ODEN Institute for Computational Engineering and Sciences, University of Texas at Austin

  • Michel Cote

    Universite de Montreal, Université de Montréal, Département de physique, Université de Montréal and RQMP, Montréal, Québec, Canada, Physics and RQMP, Université de Montréal