Pressure-induced superconductivity in CaLi(2).
A search for superconductivity has been carried out on the hexagonal polymorph of Laves-phase CaLi(2), 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 CaLi(2) at temperatures as high as 13 K. The normal-state resistivity displays a dramatic increase with pressure.
Department of Physics, Washington University, St Louis, MO 63130, USA.
T
T
Matsuoka
M
M
Debessai
J J
JJ
Hamlin
A K
AK
Gangopadhyay
J S
JS
Schilling
K
K
Shimizu