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Superconductivity in the van der Waals layered compound PS2

Li, Y-L; Stavrou, E; Zhu, Q; Clarke, SM; Li, Y; Huang, H-M; (2019) Superconductivity in the van der Waals layered compound PS2. [Rapid communication]. Physical Review B , 99 (22) , Article 220503(R. 10.1103/PhysRevB.99.220503. Green open access

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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 ( T c ) 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, PS 2 , is predicted to be thermodynamically stable above 8 GPa. Strikingly, PS 2 is a vdW layered material isostructural to 3 R − MoS 2 exhibiting a predicted T c of around 11 K at ambient pressure, both in the bulk and the monolayer form. PS 2 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.

Type: Article
Title: Superconductivity in the van der Waals layered compound PS2
Open access status: An open access version is available from UCL Discovery
DOI: 10.1103/PhysRevB.99.220503
Publisher version: https://doi.org/10.1103/PhysRevB.99.220503
Language: English
Additional information: This version is the version of record. For information on re-use, please refer to the publisher’s terms and conditions.
UCL classification: UCL
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Earth Sciences
URI: https://discovery.ucl.ac.uk/id/eprint/10075926
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