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Article: Non-magnetic impurities and in-gap bound states in topological insulators

TitleNon-magnetic impurities and in-gap bound states in topological insulators
Authors
Issue Date2011
PublisherInstitute of Physics Publishing Ltd. The Journal's web site is located at http://www.iop.org/EJ/journal/NJP
Citation
New Journal Of Physics, 2011, v. 13 How to Cite?
AbstractIn-gap bound states induced by non-magnetic impurities in various dimensional topological insulators are investigated based on a modified Dirac model that considers quadratic corrections to the mass term. Their existence and features greatly rely on the potential form of the impurity as well as the dimensionality of the topological insulator. It is analytically proven that the impurity potential modeled by the delta function can induce the bound states in one dimension (1D), but not in two and three. For a single non-magnetic impurity with a general isotropic potential, formal solutions are obtained and further numerical calculations are performed. In particular, the in-gap bound states induced by a non-magnetic impurity with isotropic Gaussian potentials in two-dimensional (2D) and three-dimensional (3D) topological insulators are numerically investigated. Information on how many in-gap bound states can be trapped by a non-magnetic Gaussian impurity is presented for the parameters from a series of topologically non-trivial materials. © IOP Publishing Ltd and Deutsche Physikalische Gesellschaft.
Persistent Identifierhttp://hdl.handle.net/10722/147671
ISSN
2015 Impact Factor: 3.57
2015 SCImago Journal Rankings: 1.902
ISI Accession Number ID
Funding AgencyGrant Number
Research Grant Council of Hong KongHKU 7051/11P
HKUST3/CRF/09
Funding Information:

This work was supported by the Research Grant Council of Hong Kong under grant numbers HKU 7051/11P and HKUST3/CRF/09.

References
Grants

 

DC FieldValueLanguage
dc.contributor.authorLu, Jen_HK
dc.contributor.authorShan, WYen_HK
dc.contributor.authorLu, HZen_HK
dc.contributor.authorShen, SQen_HK
dc.date.accessioned2012-05-29T06:07:39Z-
dc.date.available2012-05-29T06:07:39Z-
dc.date.issued2011en_HK
dc.identifier.citationNew Journal Of Physics, 2011, v. 13en_HK
dc.identifier.issn1367-2630en_HK
dc.identifier.urihttp://hdl.handle.net/10722/147671-
dc.description.abstractIn-gap bound states induced by non-magnetic impurities in various dimensional topological insulators are investigated based on a modified Dirac model that considers quadratic corrections to the mass term. Their existence and features greatly rely on the potential form of the impurity as well as the dimensionality of the topological insulator. It is analytically proven that the impurity potential modeled by the delta function can induce the bound states in one dimension (1D), but not in two and three. For a single non-magnetic impurity with a general isotropic potential, formal solutions are obtained and further numerical calculations are performed. In particular, the in-gap bound states induced by a non-magnetic impurity with isotropic Gaussian potentials in two-dimensional (2D) and three-dimensional (3D) topological insulators are numerically investigated. Information on how many in-gap bound states can be trapped by a non-magnetic Gaussian impurity is presented for the parameters from a series of topologically non-trivial materials. © IOP Publishing Ltd and Deutsche Physikalische Gesellschaft.en_HK
dc.languageengen_US
dc.publisherInstitute of Physics Publishing Ltd. The Journal's web site is located at http://www.iop.org/EJ/journal/NJPen_HK
dc.relation.ispartofNew Journal of Physicsen_HK
dc.rightsNew Journal of Physics. Copyright © Institute of Physics Publishing Ltd-
dc.rightsCreative Commons: Attribution 3.0 Hong Kong License-
dc.titleNon-magnetic impurities and in-gap bound states in topological insulatorsen_HK
dc.typeArticleen_HK
dc.identifier.emailLu, HZ: luhz@hku.hken_HK
dc.identifier.emailShen, SQ: sshen@hkucc.hku.hken_HK
dc.identifier.authorityLu, HZ=rp01599en_HK
dc.identifier.authorityShen, SQ=rp00775en_HK
dc.description.naturepublished_or_final_versionen_US
dc.identifier.doi10.1088/1367-2630/13/10/103016en_HK
dc.identifier.scopuseid_2-s2.0-80054854419en_HK
dc.identifier.hkuros202333-
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-80054854419&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume13en_HK
dc.identifier.isiWOS:000296661400002-
dc.publisher.placeUnited Kingdomen_HK
dc.relation.projectQuantum Order in Novel Materials: Superconductivity and Topological Order-
dc.relation.projectQuantum Order in Novel Materials: Superconductivity and Topological Order-
dc.relation.projectQuantum Order in Novel Materials: Superconductivity and Topological Order-
dc.identifier.scopusauthoridLu, J=16407091300en_HK
dc.identifier.scopusauthoridShan, WY=36093352700en_HK
dc.identifier.scopusauthoridLu, HZ=24376662200en_HK
dc.identifier.scopusauthoridShen, SQ=7403431266en_HK
dc.identifier.citeulike11057905-

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