Superconductivity in La<sub>2</sub>Ni<sub>2</sub>In

ORAL

Abstract

In this talk we will report1 on the physical properties of single crystaline La2Ni2In. From measurements of the electrical resistivity and specific heat as wel as Density Functional Theory calculations, we find that La2Ni2In is a weakly correlated metal, with almost completely quenched Ni magnetism, leaving only a weak Stoner enhancement of the density of states. Superconductivity was discovered at temperatures below 0.9 K. A detailed analysis of the field and temperature dependencies of the electrical resistivity, magnetic susceptibility, and specific heat at the lowest temperatures reveals that La2Ni2In is a dirty type-II superconductor with likely s-wave gap symmetry. Nanoclusters of ferromagnetic inclusions significantly affect the subgap states resulting in a non-exponential temperature dependence of the specific heat C(T) at T«Tc.

1J. Maiwald et al. Phys. Rev. B 102, 165125 (2020)

*This research was supported by NSF-DMR-1807451.

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Presenters

  • Jannis Maiwald

    • University of British Columbia

Authors

  • Jannis Maiwald

    • University of British Columbia

  • Igor Mazin

    • Physics & Astronomy, George Mason University
    • Department of Physics and Astronomy, George Mason University
    • George Mason University
    • Physics and Astronomy, George Mason University
    • Physics, George Mason University
    • Department of Physics and Astronomy,, George Mason University
    • Department of Physics and Astronomy and Quantum Science and Engineering Center, George Mason University – Fairfax, VA, USA

  • Alexander V Gurevich

    • Old Dominion University

  • Meigan Aronson

    • University of British Columbia
    • Physics and Astronomy, University of British Columbia