Journal
PHYSICAL REVIEW B
Volume 93, Issue 18, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.93.184512
Keywords
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Funding
- Brazilian agency CAPES
- Brazilian agency CNPq
- French National Research Agency through the project Subrissyme [ANR-12-JS04-0003-01]
- Spanish MINECO [FIS2014-54498-R, MAT-2014-56143-R, MDM-2014-0377, MDM-2015-0538]
- Comunidad de Madrid through program Nanofrontmag
- European Union (Graphene Flagship) [CNECT-ICT-604391]
- European Union (COST action) [MP1201]
- MINECO
- Agence Nationale de la Recherche (ANR) [ANR-12-JS04-0003] Funding Source: Agence Nationale de la Recherche (ANR)
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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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