Superconducting high pressure CaSi2 phase with Tc up to 14 K
Abstract
We have studied the occurrence of superconductivity under pressure in the CaSi2 family of compounds, namely the semimetallic trigonal phase and the α-ThSi2-type tetragonal one. Although only the latter is superconducting (Tc=1.56 K) at ambient pressure, starting from the trigonal phase and applying high pressure (>12 GPa) we have found a new superconducting phase with Tonsetc~14 K, among the highest ever found in silicon based materials.
- Publication:
-
Physical Review B
- Pub Date:
- February 2000
- DOI:
- 10.1103/PhysRevB.61.R3800
- Bibcode:
- 2000PhRvB..61.3800S
- Keywords:
-
- 74.10.+v;
- 74.62.Fj;
- Occurrence potential candidates;
- Pressure effects