Pressure-induced Superconductivity in CaLi2

Details Pressure-induced Superconductivity in CaLi2 Pressure-induced Superconductivity in CaLi2

2007-08-16

arxiv.org/abs/0708.2117v2

Phys. Rev. Lett. 100, 197003 (2008)

Physics

Condensed Matter

Superconductivity

bulk superconductivity in CaLi2 now confirmed

Scientific paper

10.1103/PhysRevLett.100.197003

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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