Superconducting high pressure CaSi2 phase with T-c up to 14 K

Authors
Sanfilippo, S Elsinger, H Nunez-Regueiro, M Laborde, O LeFloch, S Affronte, M Olcese, GL Palenzona, A
Citation
S. Sanfilippo et al., Superconducting high pressure CaSi2 phase with T-c up to 14 K, PHYS REV B, 61(6), 2000, pp. R3800-R3803
Citations number
17
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
PHYSICAL REVIEW B
ISSN journal
10980121 → ACNP
Volume
61
Issue
6
Year of publication
2000
Pages
R3800 - R3803
Database
ISI
SICI code
1098-0121(20000201)61:6<R3800:SHPCPW>2.0.ZU;2-F
Abstract
We have studied the occurrence of superconductivity under pressure in the C aSi2 family of compounds, namely the semimetallic trigonal phase and the al pha-ThSi2-type tetragonal one. Although only the latter is superconducting (T-c = 1.56 K) at ambient pressure, starting from the trigonal phase and ap plying high pressure (>12 GPa) we have found a new superconducting phase wi th T-c(onset) similar to 14 K, among the highest ever found in silicon base d materials.