Superconductivity in intercalated buckled two-dimensional materials: KGe<inf>2</inf>

Tawfik, SA; Stampfl, C; Ford, MJ

Superconductivity in intercalated buckled two-dimensional materials: KGe<inf>2</inf>

Tawfik, SA

Stampfl, C Ford, MJ

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Publication Type:: Journal Article
Citation:: Physical Chemistry Chemical Physics, 2018, 20 (37), pp. 24027 - 24032
Issue Date:: 2018-01-01

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Field	Value	Language
dc.contributor.author	Tawfik, SA https://orcid.org/0000-0003-3592-1419	en_US
dc.contributor.author	Stampfl, C	en_US
dc.contributor.author	Ford, MJ https://orcid.org/0000-0002-8595-5900	en_US
dc.date.available	2020-05-25T19:17:45Z
dc.date.issued	2018-01-01	en_US
dc.identifier.citation	Physical Chemistry Chemical Physics, 2018, 20 (37), pp. 24027 - 24032	en_US
dc.identifier.issn	1463-9076	en_US
dc.identifier.uri	http://hdl.handle.net/10453/131029
dc.description.abstract	© the Owner Societies. 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 ∼ 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 ∼ 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.	en_US
dc.relation	http://purl.org/au-research/grants/arc/DP160101301
dc.relation.ispartof	Physical Chemistry Chemical Physics	en_US
dc.relation.isbasedon	10.1039/c8cp03446j	en_US
dc.subject.classification	Chemical Physics	en_US
dc.title	Superconductivity in intercalated buckled two-dimensional materials: KGe<inf>2</inf>	en_US
dc.type	Journal Article
utslib.citation.volume	37	en_US
utslib.citation.volume	20	en_US
utslib.for	0306 Physical Chemistry (incl. Structural)	en_US
utslib.for	0204 Condensed Matter Physics	en_US
utslib.for	02 Physical Sciences	en_US
utslib.for	03 Chemical Sciences	en_US
utslib.for	09 Engineering	en_US
pubs.embargo.period	Not known	en_US
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/DVC (Research)
pubs.organisational-group	/University of Technology Sydney/Faculty of Science
utslib.copyright.status	open_access
pubs.issue	37	en_US
pubs.publication-status	Published	en_US
pubs.volume	20	en_US

Abstract:

© the Owner Societies. 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 ∼ 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 ∼ 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.

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http://hdl.handle.net/10453/131029