Superconductivity Induced by Lifshitz Transition in Pristine SnS2 under High Pressure
Jiajia Feng1,2, Cong Li2,3, Wen Deng2
1School of Physics and Key Laboratory of MEMS of the Ministry of Education, Southeast University, Nanjing 211189, People's Republic of China.
The Journal of Physical Chemistry Letters
|October 3, 2022
Summary
High pressure transforms tin disulfide (SnS2) from an insulator to a metal, inducing superconductivity. A Lifshitz transition, crucial for these changes, occurs without structural collapse.
Area of Science:
- Condensed matter physics
- Materials science under extreme conditions
Background:
- Electronic structure evolution is key in strongly correlated systems.
- The impact of Fermi surface topology on metallization and superconductivity under pressure is debated.
Purpose of the Study:
- To investigate the insulating-to-metallic and superconducting transitions in SnS2 under high pressure.
- To understand the role of electronic structure changes and Lifshitz transitions in these phenomena.
Main Methods:
- In-situ X-ray diffraction for structural stability analysis.
- First-principles calculations to identify electronic topological transitions.
Main Results:
- SnS2 remains structurally stable in its trigonal phase under compression.
- A Lifshitz transition was identified between 35 and 40 GPa.
- Observed evolution from insulating to metallic behavior, leading to superconductivity.
Conclusions:
- High pressure drives significant electronic structure changes in SnS2.
- The identified Lifshitz transition is critical for metallization and superconductivity.
- SnS2 offers a model system for studying pressure-induced electronic phenomena without structural failure.
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