Superconductivity Induced by Lifshitz Transition in Pristine SnS₂ under High Pressure

Abstract

The importance of electronic structure evolutions and reconstitutions is widely acknowledged for strongly correlated systems. The precise effect of pressurized Fermi surface topology on metallization and superconductivity is a much-debated topic. In this work, an evolution from insulating to metallic behavior, followed by a superconducting transition, is systematically investigated in SnS2 under high pressure. In-situ X-ray diffraction measurements show the stability of the trigonal structure under compression. Interestingly, a Lifshitz transition, which has an important bearing on the metallization and superconductivity, is identified by the first-principles calculations between 35 and 40 GPa. Our findings provide a unique playground for exploring the relationship of electronic structure, metallization, and superconductivity under high pressure without crystal structural collapse.

Giant Reduction of Stabilized Pressure for the Superconducting Re0.8V0.2Se2 Phase

“…In addition, the quick rise of d R H /d P before and after the superconducting transition further evidenced the impact of pressure on the electronic structure. We note that the pressure-induced metallization and superconductivity in SnS 2 also involve the variation of the Fermi surface, which is very similar to our case. As shown in Figure c, the pressure dependence of the electron-type carrier density n e of Re 0.8 V 0.2 Se 2 was extracted from Hall measurements, where n e = 1/( eR H ).…”

Investigation of pressure-driven superconductivity in TlInTe2: an ab initio study

“…Next, we investigated the effect of pressure on the Fermi surface topology of TlInTe 2 [56]. In a number of systems [57][58][59][60][61], the emergence or disappearance of superconductivity has been associated with a Lifshitz transition [62]. This transition is manifested as a subtle change in the Fermi surface topology (e.g., the appearance or disappearance of a pocket or a neck on the Fermi surface) driven by external parameters, such as doping or pressure, and without breaking the crystal symmetry.…”

Electrical resistivity and the Hall effect in the doped Mott-Hubbard material with strong spin-charge coupling

“…In particular, the electronic topological transition induced by doping has been found and intensively studied in cuprate [29,[70][71][72] and iron-based superconductors [73][74][75][76][77][78][79]. Pressure-induced Lifshitz transition has been investigated in several representative materials [80][81][82][83] and proposed to be related to the the emergence of superconductivity in few systems [84][85][86][87][88]. The Lifshitz transition induced by the external magnetic field was experimentally and theoretically studied in cuprate superconductors [63][64][65]89], heavy-fermion systems [90][91][92][93], multi-band iron-based superconductors [69], Dirac materials [94], and the ultracold Fermi mixtures in optical lattices [95].…”