Hydrostatic pressure effect on several superconductors: 1<i>T</i>-＆2<i>H</i>-Ta(S,Se)<sub>2 </sub>and (Ba, Sr)Bi<sub>3</sub>
ORAL
Abstract
Under high hydrostatic pressure in Cubic Anvil Pressure Apparent, we revealed the universal phase diagram of superconductivity and charge density wave (CDW) for 1T- and 2H-Ta(S,Se)2 by electrical transport and ac susceptibility. For 1T-, CDWs and SC coexists in narrow pressure windows and superconducting transition temperature (Tc) increases monotonously, clarifying that the superconducting cooper-pairing is associated with CDW instability [1, 2]. For 2H-, CDWs and SC coexists in a real sapce and Tc tends to saturation at critical pressures. Possible physical mechanisms are proposed. Besides, we firstly reported pressured-induced crossover from Type-II to Type-I superconductivity in spin-orbit-coupled SCs (Ba, Sr)Bi3 [3].
References：
[1] Bosen Wang, et al, Phys. Rev. B. 95, 220501(R) (2017).
[2] Bosen Wang, et al, Phys. Rev. B. 97, 220504 (R) (2018) (Editor’s Suggestion).
[3] Bosen Wang, et al, Phys. Rev. B. 98, 220506 (R) (2018).
References：
[1] Bosen Wang, et al, Phys. Rev. B. 95, 220501(R) (2017).
[2] Bosen Wang, et al, Phys. Rev. B. 97, 220504 (R) (2018) (Editor’s Suggestion).
[3] Bosen Wang, et al, Phys. Rev. B. 98, 220506 (R) (2018).
–
Presenters
-
Bosen Wang
- Chinese Academy of Sciences,Institute of Physics