Pressure-induced superconductivity in the metal thiophosphate Pb2P2S6
Xinyi He, Zhitao Zhang, Zhenyu Ding, Shuyang Wang, Chunhua Chen, Xuliang Chen, Yonghui Zhou, Chao An, Min Zhang, Ying Zhou, Xiaoping Yang, Zhaorong Yang
DOI 10.1103/PhysRevMaterials.7.054801 · Physical Review Materials
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Abstract
We report on the pressure-tuning of the physical properties of a metal thiophosphate Pb2P2S6. Resistance measurements evidence a semiconducting-to-metallic transition at around 39 GPa and immediate emergence of superconductivity. The superconducting critical temperature TC monotonously increases from 3.2 to 5.1 K until the highest studied pressure 54 GPa. Over the whole pressure range, the pristine monoclinic lattice symmetry is not changed. Moreover, the resonance Raman scattering is observed in the range of 8–12 GPa depending on the excitation energy used. These findings establish Pb2P2S6 as a new platform to explore intrinsic metallization and superconductivity, which may promote developments of relevant applications.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Pb2P2S6 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 3.2 | 39.4 GPa | onset |
| Pb2P2S6 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 1.9 | 45.8 GPa | zero_resistance |
| Pb2P2S6 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 5.1 | 54 GPa | onset |
| FePSe3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | 9 GPa | unknown |
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