Superconductivity in intercalated buckled two-dimensional materials: KGe2

Abbas, S 2018, 'Superconductivity in intercalated buckled two-dimensional materials: KGe2', Physical Chemistry Chemical Physics, vol. 20, no. 37, pp. 24027-24032.

Document type: Journal Article
Collection: Journal Articles

Title Superconductivity in intercalated buckled two-dimensional materials: KGe2
Author(s) Abbas, S
Year 2018
Journal name Physical Chemistry Chemical Physics
Volume number 20
Issue number 37
Start page 24027
End page 24032
Total pages 6
Publisher Royal Society of Chemistry
Abstract Germanene has emerged as a novel two-dimensional material with various interesting properties and applications. Here we report the possibility of superconductivity in a stable potassium intercalated germanene compound, KGe2, with a transition temperature Tc B 11 K, and an electron-phonon coupling of 1.9. Applying a 5% tensile strain, which reduces the buckling height by 4.5%, leads to the reduction of the electron-phonon coupling by 11% and a slight increase in Tc B 12 K. That is, strong electron-phonon coupling results from the buckled structure of the germanene layers. Despite being an intercalated van der Waals material similar to intercalated graphite superconductors, it does not possess an occupied interlayer state.
Subject Condensed Matter Modelling and Density Functional Theory
Radiation and Matter
Quantum Chemistry
DOI - identifier 10.1039/C8CP03446J
Copyright notice © the Owner Societies 2018
ISSN 1463-9076
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