Jump to main content
Jump to site search

Issue 36, 2019
Previous Article Next Article

Prediction of strain-induced phonon-mediated superconductivity in monolayer YS

Author affiliations

Abstract

The search for two-dimensional superconductors has attracted increasing interest because of their potential applications in constructing nanoscale superconducting devices. Through swarm-intelligence based CALYPSO method and the first-principles calculations, we have identified a monolayer structure for yttrium sulfide (t-YS), which is energetically and dynamically stable. The application of biaxial strain turns t-YS to a Bardeen–Cooper–Schrieffer superconductor, which mainly originates from the softening of in-plane modes of Y atoms. The superconducting critical temperature increases monotonously with strain, which reaches 6 K at a maximum strain of 10%. Calculations show that doping at 0.3 holes per unit cell based on a strain of 10% could further enhance the superconductivity to 7.3 K. Simulations have helped to propose a candidate substrate with ∼8.3% lattice mismatch to obtain superconductive t-YS experimentally. The findings will enrich two-dimensional superconductors and stimulate immediate experimental interest.

Graphical abstract: Prediction of strain-induced phonon-mediated superconductivity in monolayer YS

Back to tab navigation

Supplementary files

Article information


Submitted
06 Jul 2019
Accepted
19 Aug 2019
First published
20 Aug 2019

J. Mater. Chem. C, 2019,7, 11184-11190
Article type
Paper

Prediction of strain-induced phonon-mediated superconductivity in monolayer YS

Z. Qu, S. Lin, M. Xu, J. Hao, J. Shi, W. Cui and Y. Li, J. Mater. Chem. C, 2019, 7, 11184
DOI: 10.1039/C9TC03657A

Social activity

Search articles by author

Spotlight

Advertisements