We have studied the occurrence of superconductivity under pressure in the CaSi2 family of compounds,namely the semimetallic trigonal phase and the a-ThSi2-type tetragonal one. Although only the latter issuperconducting (Tc51.56 K) at ambient pressure, starting from the trigonal phase and applying high pressure~.12 GPa! we have found a new superconducting phase with Tconset;14 K, among the highest ever found insilicon based materials.
Superconductivity with Tc up to 14K in CaSi2 under pressure / Sanfilippo, S.; Elsinger, E.; NUNEZ REGUEIRO, N.; Laborde, O.; LE FLOCH, S.; Affronte, Marco; Olcese, G. L.; Palenzona, A.. - In: PHYSICAL REVIEW. B, CONDENSED MATTER AND MATERIALS PHYSICS. - ISSN 1098-0121. - STAMPA. - 61:(2000), pp. 3800-3800.
Superconductivity with Tc up to 14K in CaSi2 under pressure
AFFRONTE, Marco;
2000
Abstract
We have studied the occurrence of superconductivity under pressure in the CaSi2 family of compounds,namely the semimetallic trigonal phase and the a-ThSi2-type tetragonal one. Although only the latter issuperconducting (Tc51.56 K) at ambient pressure, starting from the trigonal phase and applying high pressure~.12 GPa! we have found a new superconducting phase with Tconset;14 K, among the highest ever found insilicon based materials.
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