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Realization of Dirac Cones in Few Bilayer Sb(111) Films by Surface Modification
Pan H.1; Wang X.-S.2
2015-12-22
Source PublicationNanoscale Research Letters
ISSN1556276X 19317573
Volume10Issue:1
Abstract

We report the first-principle study on the recovery and linearization of Dirac cones in the electronic band structures of a few bilayer Sb(111) films (n-BL Sb) by surface modification. Due to the interaction between the surface states on the two surfaces of a free-standing film, the distorted Dirac cone in n-BL Sb(111) (n < 5) disappears. We demonstrate that the Dirac cone can be restored by functionalizing one surface with certain atoms including H, Ag, and Au, to reduce the inter-surface interaction. We further show that an ideal Dirac cone with linear dispersion of topological surface states near the zone center can be realized by functionalizing both surfaces of the film with oxygen, which enhances spin-orbital coupling. The realization of Dirac cone by surface functionalization shows promise for applications of topologic materials to spintronic devices and their operation in complicated conditions.

KeywordDirac Cones Few Bilayer Sb(111) Films First-principles Calculations Surface Modification
DOI10.1186/s11671-015-1043-8
URLView the original
Indexed BySCIE
Language英語English
WOS Research AreaScience & Technology - Other Topics ; Materials Science ; Physics
WOS SubjectNanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied
WOS IDWOS:000365120200002
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Cited Times [WOS]:4   [WOS Record]     [Related Records in WOS]
Document TypeJournal article
CollectionINSTITUTE OF APPLIED PHYSICS AND MATERIALS ENGINEERING
Affiliation1.Universidade de Macau
2.National University of Singapore
First Author AffilicationUniversity of Macau
Recommended Citation
GB/T 7714
Pan H.,Wang X.-S.. Realization of Dirac Cones in Few Bilayer Sb(111) Films by Surface Modification[J]. Nanoscale Research Letters,2015,10(1).
APA Pan H.,&Wang X.-S..(2015).Realization of Dirac Cones in Few Bilayer Sb(111) Films by Surface Modification.Nanoscale Research Letters,10(1).
MLA Pan H.,et al."Realization of Dirac Cones in Few Bilayer Sb(111) Films by Surface Modification".Nanoscale Research Letters 10.1(2015).
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