Valley polarized quantum Hall effect and topological insulator phase transitions in silicene
Type
ArticleKAUST Department
Computational Physics and Materials Science (CPMS)Material Science and Engineering Program
Physical Science and Engineering (PSE) Division
Date
2013-01-25Preprint Posting Date
2012-07-19Online Publication Date
2013-01-25Print Publication Date
2013-12Permanent link to this record
http://hdl.handle.net/10754/325374
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Show full item recordAbstract
The electronic properties of silicene are distinct from both the conventional two dimensional electron gas and the famous graphene due to strong spin orbit interaction and the buckled structure. Silicene has the potential to overcome limitations encountered for graphene, in particular the zero band gap and weak spin orbit interaction. We demonstrate a valley polarized quantum Hall effect and topological insulator phase transitions. We use the Kubo formalism to discuss the Hall conductivity and address the longitudinal conductivity for elastic impurity scattering in the first Born approximation. We show that the combination of an electric field with intrinsic spin orbit interaction leads to quantum phase transitions at the charge neutrality point, providing a tool to experimentally tune the topological state. Silicene constitutes a model system for exploring the spin and valley physics not accessible in graphene due to the small spin orbit interaction.Citation
Tahir M, Schwingenschlögl U (2013) Valley polarized quantum Hall effect and topological insulator phase transitions in silicene. Sci Rep 3. doi:10.1038/srep01075.Publisher
Springer NatureJournal
Scientific ReportsPubMed ID
23355947PubMed Central ID
PMC3555089arXiv
1207.4745Additional Links
http://arxiv.org/abs/1207.4745ae974a485f413a2113503eed53cd6c53
10.1038/srep01075
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Except where otherwise noted, this item's license is described as This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivs 3.0 Unported License. To view a copy of this license, visit http://creativecommons.org/licenses/by-nc-nd/3.0/
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