Superconductivity Induced by Lifshitz Transition in Pristine SnS<sub>2</sub> under High Pressure
Jiajia Feng, Cong Li, Wen Deng, Bencheng Lin, Wenhui Liu, Resta A. Susilo, Hongliang Dong, Zhiqiang Chen, Nan Zhou, Xiaolei Yi, Xiangzhuo Xing, Feng Ke, Zhenxian Liu, H. W. Sheng, Zhixiang Shi, Bin Chen
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.