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)
1J. Maiwald et al. Phys. Rev. B 102, 165125 (2020)
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Presenters
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Jannis Maiwald
University of British Columbia
Authors
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Jannis Maiwald
University of British Columbia
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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
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Alexander V Gurevich
Old Dominion University
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Meigan Aronson
University of British Columbia, Physics and Astronomy, University of British Columbia