Calculation of Room Temperature Conductivity and Mobility in Tin-Based Topological Insulator Nanoribbons

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dc.contributor.ResIDA-4508-2012 (Fischetti, MV)en_US
dc.contributor.authorVandenberghe, William G.en_US
dc.contributor.authorFischetti, Massimo V.en_US
dc.date.accessioned2015-04-03T19:35:18Z
dc.date.available2015-04-03T19:35:18Z
dc.date.created2014-11-06
dc.description.abstractMonolayers of tin (stannanane) functionalized with halogens have been shown to be topological insulators. Using density functional theory (DFT), we study the electronic properties and room-temperature transport of nanoribbons of iodine-functionalized stannanane showing that the overlap integral between the wavefunctions associated to edge-states at opposite ends of the ribbons decreases with increasing width of the ribbons. Obtaining the phonon spectra and the deformation potentials also from DFT, we calculate the conductivity of the ribbons using the Kubo-Greenwood formalism and show that their mobility is limited by inter-edge phonon backscattering. We show that wide stannanane ribbons have a mobility exceeding 10 6 cm(2)/Vs. Contrary to ordinary semiconductors, two-dimensional topological insulators exhibit a high conductivity at low charge density, decreasing with increasing carrier density. Furthermore, the conductivity of iodine-functionalized stannanane ribbons can be modulated over a range of three orders of magnitude, thus rendering this material extremely interesting for classical computing applications.en_US
dc.identifier.bibliographicCitationVandenberghe, William G., and Massimo V. Fischetti. 2014. "Calculation of room temperature conductivity and mobility in tin-based topological insulator nanoribbons." Journal of Applied Physics 116(17): doi:.10.1063/1.4901063.
dc.identifier.issn0021-8979en_US
dc.identifier.issue17en_US
dc.identifier.urihttp://hdl.handle.net/10735.1/4426
dc.identifier.volume116en_US
dc.relation.urihttp://dx.doi.org/10.1063/1.4901063en_US
dc.rights©2014 AIP Publishing LLCen_US
dc.source.journalJournal of Applied Physicsen_US
dc.subjectPhononsen_US
dc.subjectFermi levelsen_US
dc.subjectWave functionsen_US
dc.subjectBackscatteringen_US
dc.subjectCarrier mobilityen_US
dc.titleCalculation of Room Temperature Conductivity and Mobility in Tin-Based Topological Insulator Nanoribbonsen_US
dc.type.genrearticleen_US

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