6533b857fe1ef96bd12b44eb
RESEARCH PRODUCT
Strong enhancement of superconductivity at high pressures within the charge-density-wave states of 2H-TaS 2 and 2H-TaSe 2
D. C. FreitasPierre RodièreM.r. OsorioE Navarro-moratallaN.m. NemesV.g. TissenL CarioE CoronadoM García-hernándezS VieiraM Núñez-regueiroH Suderowsubject
7470Xa[PHYS.COND.CM-S]Physics [physics]/Condensed Matter [cond-mat]/Superconductivity [cond-mat.supr-con]Superconductivity (cond-mat.supr-con)Condensed Matter - Strongly Correlated ElectronsStrongly Correlated Electrons (cond-mat.str-el)Condensed Matter - SuperconductivityFOS: Physical sciences7445Lr7425Dw[PHYS.COND.CM-SCE]Physics [physics]/Condensed Matter [cond-mat]/Strongly Correlated Electrons [cond-mat.str-el]description
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 |