Document Type
Article
Publication Date
6-10-2019
Publication Title
Physical Review B
Publisher
American Physical Society
Volume
99
First page number:
1
Last page number:
6
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.
Disciplines
Chemistry | Physics
File Format
File Size
734 KB
Language
English
Creative Commons License
This work is licensed under a Creative Commons Attribution 4.0 License.
Repository Citation
Li, Y.,
Stavrou, E.,
Zhu, Q.,
Clarke, S. M.,
Li, Y.,
Huang, H.
(2019).
Superconductivity in the van der Waals Layered Compound PS2.
Physical Review B, 99
1-6.
American Physical Society.
http://dx.doi.org/10.1103/PhysRevB.99.220503