Superconductivity in the van der Waals layered compound PS2

Yan Ling Li; Elissaios Stavrou; Qiang Zhu; Samantha M. Clarke; Yunguo Li; Hong Mei Huang

doi:10.1103/PhysRevB.99.220503

Superconductivity in the van der Waals layered compound PS2

Yan Ling Li, Elissaios Stavrou, Qiang Zhu, Samantha M. Clarke, Yunguo Li, Hong Mei Huang

Research output: Contribution to journal › Article › peer-review

10 Scopus citations

Abstract

van der Waals (vdW) layered compounds provided a fruitful research platform for the realization of superconductivity. However, a vdW layered superconductor with a high transition temperature (Tc) at ambient conditions is still rare. Here, using variable-composition evolutionary structure predictions, we systematically explored the stable compounds in the P-S system up to 20 GPa. Opposed to the complex stoichiometries at ambient conditions, only one compound, PS2, is predicted to be thermodynamically stable above 8 GPa. Strikingly, PS2 is a vdW layered material isostructural to 3R-MoS2 exhibiting a predicted Tc of around 11 K at ambient pressure, both in the bulk and the monolayer form. PS2 has been successfully synthesized via high-pressure experiments following the theoretical predictions. This enables replacing transition metals with group V elements in transition-metal dichalcogenides and paves the way in the search for vdW layered materials with superior properties.

Original language	English
Article number	220503
Journal	Physical Review B
Volume	99
Issue number	22
DOIs	https://doi.org/10.1103/PhysRevB.99.220503
State	Published - 10 Jun 2019
Externally published	Yes

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title = "Superconductivity in the van der Waals layered compound PS2",

abstract = "van der Waals (vdW) layered compounds provided a fruitful research platform for the realization of superconductivity. However, a vdW layered superconductor with a high transition temperature (Tc) at ambient conditions is still rare. Here, using variable-composition evolutionary structure predictions, we systematically explored the stable compounds in the P-S system up to 20 GPa. Opposed to the complex stoichiometries at ambient conditions, only one compound, PS2, is predicted to be thermodynamically stable above 8 GPa. Strikingly, PS2 is a vdW layered material isostructural to 3R-MoS2 exhibiting a predicted Tc of around 11 K at ambient pressure, both in the bulk and the monolayer form. PS2 has been successfully synthesized via high-pressure experiments following the theoretical predictions. This enables replacing transition metals with group V elements in transition-metal dichalcogenides and paves the way in the search for vdW layered materials with superior properties.",

author = "Li, {Yan Ling} and Elissaios Stavrou and Qiang Zhu and Clarke, {Samantha M.} and Yunguo Li and Huang, {Hong Mei}",

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doi = "10.1103/PhysRevB.99.220503",

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AU - Li, Yan Ling

AU - Stavrou, Elissaios

AU - Zhu, Qiang

AU - Clarke, Samantha M.

AU - Li, Yunguo

AU - Huang, Hong Mei

PY - 2019/6/10

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Superconductivity in the van der Waals layered compound PS2

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