Pressure-induced ferroelectric-to-superconductor transition in SnPS3
Binbin Yue, Wei Zhong, Ting Wen, Yonggang Wang, Hui Yu, Xiaohui Yu, Changfeng Chen, Jian-Tao Wang, Fang Hong
DOI 10.1103/PhysRevB.107.L140501 · Physical Review B
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Abstract
Ferroelectricity and superconductivity are prominent yet distinct quantum phenomena; materials exhibiting both of these phenomena are rare and of great fundamental and practical interest. Here, combining ab initio calculations and in situ measurements, we show that ferroelectric SnPS3 turns into a superconductor under pressure at 31.7 GPa, accompanied by a structural phase transition. Electronic band structure calculations reveal a partial flat band near the Fermi energy in compressed SnPS3, suggesting correlation effects as a possible origin of the observed superconducting state. The discovery of a pressure-induced ferroelectric-to-superconductor transition in SnPS3 raises the prospect of establishing this intriguing quantum phenomenon among a large class of metal phosphorous trichalcogenides, thereby broadening the material basis to elucidate the underlying physics.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| SnPS3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 2.2 | 31.7 GPa | onset |
| SnPS3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 2.8 | 48.9 GPa | onset |
| FePSe3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 3 | 9 GPa | unknown |
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