Please use this identifier to cite or link to this item:
https://doi.org/10.1186/s11671-015-1043-8
Title: | Realization of Dirac Cones in Few Bilayer Sb(111) Films by Surface Modification | Authors: | Pan, H Wang, X.-S |
Keywords: | Calculations Surface states Bi-layer Dirac cones Electronic band structure First-principle study First-principles calculation Spin-orbital coupling Surface Functionalization Surface interactions Surface treatment |
Issue Date: | 2015 | Citation: | Pan, H, Wang, X.-S (2015). Realization of Dirac Cones in Few Bilayer Sb(111) Films by Surface Modification. Nanoscale Research Letters 10 (1) : 334. ScholarBank@NUS Repository. https://doi.org/10.1186/s11671-015-1043-8 | Rights: | Attribution 4.0 International | 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. © 2015, Pan and Wang. | Source Title: | Nanoscale Research Letters | URI: | https://scholarbank.nus.edu.sg/handle/10635/180869 | ISSN: | 19317573 | DOI: | 10.1186/s11671-015-1043-8 | Rights: | Attribution 4.0 International |
Appears in Collections: | Elements Staff Publications |
Show full item record
Files in This Item:
File | Description | Size | Format | Access Settings | Version | |
---|---|---|---|---|---|---|
10_1186_s11671-015-1043-8.pdf | 1.46 MB | Adobe PDF | OPEN | None | View/Download |
This item is licensed under a Creative Commons License