6533b82afe1ef96bd128ca8f
RESEARCH PRODUCT
Strong enhancement of superconductivity at high pressures within the charge-density-wave states of2H−TaS2and2H−TaSe2
Norbert M. NemesEugenio CoronadoSebastian VieiraSebastian VieiraPierre RodièrePierre RodièreEfrén Navarro-moratallaMar García-hernándezLaurent CarioV. G. TissenHermann SuderowHermann SuderowD. C. FreitasD. C. FreitasManuel Núñez-regueiroManuel Núñez-regueiroM. R. Osoriosubject
Pressure rangeSuperconductivityMaterials scienceTransition metalCondensed matter physics0103 physical sciences02 engineering and technologyPressure dependence021001 nanoscience & nanotechnology010306 general physics0210 nano-technology01 natural sciencesCharge density wavedescription
We present measurements of the superconducting and charge density wave critical temperatures (Tc and TCDW) as a function of pressure in the transition metal dichalchogenides 2H-TaSe2 and 2H-TaS2. Resistance and susceptibility measurements show that Tc 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 TCDW 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.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2016-05-24 | Physical Review B |