Robust <i>d<sub>x<sup>2</sup>−y<sup>2 </sup></sub></i>wave superconductivity of infinite-layer nickelates

ORAL

Abstract

Motivated by the recent observation of superconductivity in strontium doped NdNiO2, we study the superconducting instabilities in this system from various vantage points. Starting with first principles calculations, we construct two distinct tight-binding models, a simpler single-orbital as well as a three-orbital model, both of which capture the key low energy degrees of freedom to varying degree of accuracy. We study superconductivity in both models using the random phase approximation (RPA). We then analyze the problem at stronger coupling, and study the dominant pairing instability in the associated t-J model limits. In all instances, the dominant pairing tendency is in the dx2−y2 channel, analogous to the cuprate superconductors.

*The work in Würzburg is funded by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) through Project-ID 258499086 - SFB 1170 and through the Würzburg-Dresden Cluster of Excellence on Complexity and Topology in Quantum Matter – ct.qmat Project-ID 39085490 - EXC 2147.
H.Y.H. and S.R. are supported by the DOE Office of Basic Energy Sciences, contract DEAC02-76SF00515.

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Presenters

  • Tilman Schwemmer

    • Institute for Theoretical Physics, University of Wuerzburg
    • Institut für Theoretische Physik und Astrophysik, Universität Würzburg

Authors

  • Xianxin Wu

    • Institute for Theoretical Physics, University of Wuerzburg
    • Institut für Theoretische Physik und Astrophysik, Universität Würzburg
    • Physics department, Pennsylvania State University
    • University of Wurzburg
    • Institut für Theoretische Physik und Astrophysik, University of Würzburg

  • Domenico Di Sante

    • University of Wurzburg
    • University of Wuerzburg (Germany)
    • Institut für Theoretische Physik und Astrophysik, Universität Würzburg
    • Institut für Theoretische Physik und Astrophysik, University of Würzburg

  • Tilman Schwemmer

    • Institute for Theoretical Physics, University of Wuerzburg
    • Institut für Theoretische Physik und Astrophysik, Universität Würzburg

  • Werner R Hanke

    • Institute for Theoretical Physics, University of Wuerzburg
    • Institut für Theoretische Physik und Astrophysik, Universität Würzburg
    • Institut für Theoretische Physik und Astrophysik, University of Würzburg
    • Universität Würzburg, Germany

  • Harold Hwang

    • Institute for Materials and Energy Sciences, Stanford University
    • Stanford University
    • Department of Applied Physics, Stanford University
    • Applied Physics, Stanford University
    • SIMES, SLAC
    • Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory, Menlo Park, CA 94025, USA
    • SLAC National Accelerator Lab.
    • Physics, Stanford University
    • Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory

  • Srinivas Raghu

    • Institute for Materials and Energy Sciences, Stanford University
    • Stanford Univ
    • Stanford University, Stanford

  • Ronny Thomale

    • University of Wurzburg
    • Institute for Theoretical Physics, University of Wuerzburg
    • Theoretical physics I, University of Wuerzburg
    • University of Wuerzburg
    • Institut für Theoretische Physik und Astrophysik, Universität Würzburg
    • Physics department, University of Wuerzburg
    • Institut für Theoretische Physik und Astrophysik, University of Würzburg
    • Institute for Theoretical Physics and Astrophysics, University of Wurzburg