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Freitas, D. C., Rodiere, P., Osorio, M. R., Navarro-Moratalla, E., Nemes, N. M., Tissen, V. G., Cario, L., Coronado, E., Garcia-Hernandez, M., Vieira, S., Nunez-Regueiro, M. & Suderow, H. (2016) Strong enhancement of superconductivity at high pressures within the charge-density-wave states of 2H-TaS2 and 2H-TaSe2. Phys. Rev. B, 93 184512.
Added by: Richard Baschera (2016-06-22 06:49:42) Last edited by: Richard Baschera (2016-06-22 06:53:03) |
| Type de référence: Article DOI: 10.1103/PhysRevB.93.184512 Numéro d'identification (ISBN etc.): 2469-9950 Clé BibTeX: Freitas2016 Voir tous les détails bibliographiques  |
Catégories: INTERNATIONAL, PMN Mots-clés: 1t-tas2, behavior, commensurate, crystals, graphene, lock-in transition, model, tantalum diselenide, transition-metal dichalcogenides Créateurs: Cario, Coronado, Freitas, Garcia-Hernandez, Navarro-Moratalla, Nemes, Nunez-Regueiro, Osorio, Rodiere, Suderow, Tissen, Vieira Collection: Phys. Rev. B |
Consultations : 2/727
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We present measurements of the superconducting and charge-density-wave (CDW) critical temperatures (T-c and T-CDW) as a function of pressure in the transition metal dichalchogenides 2H-TaSe2 and 2H-TaS2. Resistance and susceptibility measurements show that T-c increases from temperatures below 1 K up to 8.5 K at 9.5 GPa in 2H-TaS2 and 8.2 K at 23 GPa in 2H-TaSe2. We observe a kink in the pressure dependence of T-CDW at about 4 GPa that we attribute to the lock-in transition from incommensurate CDW to commensurate CDW. Above this pressure, the commensurate TCDW slowly decreases, coexisting with superconductivity within our full pressure range.
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