Pressure-induced Superconductivity in CaLi2
T. Matsuoka, M. Debessai, J. J. Hamlin, A. K. Gangopadhyay, J. S., Schilling
TL;DR
This study discovers pressure-induced superconductivity in CaLi2, with critical temperatures reaching up to 13 K under high pressure, highlighting anomalous behavior predicted by theoretical models.
Contribution
It reports the first experimental observation of superconductivity in CaLi2 under high pressure, confirming theoretical predictions of anomalous behavior.
Findings
Superconductivity appears above 1.10 K at high pressure
Superconducting transition temperature reaches 13 K
Normal-state resistivity increases dramatically with pressure
Abstract
A search for superconductivity has been carried out on the hexagonal polymorph of Laves-phase CaLi2, a compound for which Feng, Ashcroft, and Hoffmann predict highly anomalous behavior under pressure. No superconductivity is observed above 1.10 K at ambient pressure. However, high-pressure ac susceptibility and electrical resistivity studies to 81 GPa reveal bulk superconductivity in CaLi2 at temperatures as high as 13 K. The normal-state resistivity shows a dramatic increase with pressure.
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