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.
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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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