K-intercalated carbon systems: Effects of dimensionality and substrate

Handle URI:
http://hdl.handle.net/10754/562215
Title:
K-intercalated carbon systems: Effects of dimensionality and substrate
Authors:
Kaloni, Thaneshwor P.; Kahaly, M. Upadhyay; Cheng, Yingchun; Schwingenschlögl, Udo ( 0000-0003-4179-7231 )
Abstract:
Density functional theory is employed to investigate the electronic properties of K-intercalated carbon systems. Young's modulus indicates that the intercalation increases the intrinsic stiffness. For K-intercalated bilayer graphene on SiC(0001) the Dirac cone is maintained, whereas a trilayer configuration exhibits a small splitting at the Dirac point. Interestingly, in contrast to many other intercalated carbon systems, the presence of the SiC(0001) substrate does not suppress but rather enhances the charge carrier density. Reasonably high values are found for all systems, the highest carrier density for the bilayer. The band structure and electron-phonon coupling of free-standing K-intercalated bilayer graphene points to a high probability for superconductivity in this system. © 2012 Europhysics Letters Association.
KAUST Department:
Physical Sciences and Engineering (PSE) Division; Materials Science and Engineering Program; Computational Physics and Materials Science (CPMS)
Publisher:
IOP Publishing
Journal:
EPL (Europhysics Letters)
Issue Date:
1-Jun-2012
DOI:
10.1209/0295-5075/98/67003
Type:
Article
ISSN:
02955075
Appears in Collections:
Articles; Physical Sciences and Engineering (PSE) Division; Materials Science and Engineering Program; Computational Physics and Materials Science (CPMS)

Full metadata record

DC FieldValue Language
dc.contributor.authorKaloni, Thaneshwor P.en
dc.contributor.authorKahaly, M. Upadhyayen
dc.contributor.authorCheng, Yingchunen
dc.contributor.authorSchwingenschlögl, Udoen
dc.date.accessioned2015-08-03T09:56:39Zen
dc.date.available2015-08-03T09:56:39Zen
dc.date.issued2012-06-01en
dc.identifier.issn02955075en
dc.identifier.doi10.1209/0295-5075/98/67003en
dc.identifier.urihttp://hdl.handle.net/10754/562215en
dc.description.abstractDensity functional theory is employed to investigate the electronic properties of K-intercalated carbon systems. Young's modulus indicates that the intercalation increases the intrinsic stiffness. For K-intercalated bilayer graphene on SiC(0001) the Dirac cone is maintained, whereas a trilayer configuration exhibits a small splitting at the Dirac point. Interestingly, in contrast to many other intercalated carbon systems, the presence of the SiC(0001) substrate does not suppress but rather enhances the charge carrier density. Reasonably high values are found for all systems, the highest carrier density for the bilayer. The band structure and electron-phonon coupling of free-standing K-intercalated bilayer graphene points to a high probability for superconductivity in this system. © 2012 Europhysics Letters Association.en
dc.publisherIOP Publishingen
dc.titleK-intercalated carbon systems: Effects of dimensionality and substrateen
dc.typeArticleen
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Divisionen
dc.contributor.departmentMaterials Science and Engineering Programen
dc.contributor.departmentComputational Physics and Materials Science (CPMS)en
dc.identifier.journalEPL (Europhysics Letters)en
kaust.authorKaloni, Thaneshwor P.en
kaust.authorKahaly, M. Upadhyayen
kaust.authorCheng, Yingchunen
kaust.authorSchwingenschlögl, Udoen
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