Superconductivity in La2Ni2In

Jannis Maiwald; Igor I. Mazin; Alex Gurevich; Meigan Aronson

doi:10.1103/PhysRevB.102.165125

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Superconductivity in La2Ni2In

Jannis Maiwald, Igor I. Mazin, Alex Gurevich, Meigan Aronson

DOI 10.1103/PhysRevB.102.165125 · Physical Review B

T1

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Abstract

We report here the properties of single crystals of La2Ni2In. Electrical resistivity and specific heat measurements concur with the results of density functional theory calculations, finding that La2Ni2In is a weakly correlated metal, where the Ni magnetism is almost completely quenched, leaving only a weak Stoner enhancement of the density of states. Superconductivity is observed at temperatures below 0.9 K. A detailed analysis of the field and temperature dependencies of the 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 nonexponential temperature dependence of the specific heat C(T) at T≪Tc.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
La2Ni2In Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	0.89	Pressure not reported	onset
La2Ni2In Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	0.89	Pressure not reported	onset
La2Ni2In Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	0.89	Pressure not reported	onset