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Article: A variant transfer matrix method suitable for transport through multi-probe systems

TitleA variant transfer matrix method suitable for transport through multi-probe systems
Authors
Issue Date2007
PublisherInstitute of Physics Publishing. The Journal's web site is located at http://www.iop.org/journals/nano
Citation
Nanotechnology, 2007, v. 18, article no. 435402 How to Cite?
AbstractWe have developed a variant transfer matrix method that is suitable for transport through multi-probe systems. Using this method, we have numerically studied the quantum spin Hall effect (QSHE) on 2D graphene with both intrinsic (Vso) and Rashba (Vr) spin–orbit (SO) couplings. The integer QSHE arises in the presence of intrinsic SO interaction and is gradually destroyed by the Rashba SO interaction and disorder fluctuation. We have numerically determined the phase boundaries separating integer QSHE and spin Hall liquid. We have found that when Vso≥0.2t with t the hopping constant the energy gap needed for the integer QSHE is the largest satisfying |E|
Persistent Identifierhttp://hdl.handle.net/10722/81007
ISSN
2015 Impact Factor: 3.573
2015 SCImago Journal Rankings: 1.196
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorQiao, Zen_HK
dc.contributor.authorWang, Jen_HK
dc.date.accessioned2010-09-06T08:12:42Z-
dc.date.available2010-09-06T08:12:42Z-
dc.date.issued2007en_HK
dc.identifier.citationNanotechnology, 2007, v. 18, article no. 435402en_HK
dc.identifier.issn0957-4484en_HK
dc.identifier.urihttp://hdl.handle.net/10722/81007-
dc.description.abstractWe have developed a variant transfer matrix method that is suitable for transport through multi-probe systems. Using this method, we have numerically studied the quantum spin Hall effect (QSHE) on 2D graphene with both intrinsic (Vso) and Rashba (Vr) spin–orbit (SO) couplings. The integer QSHE arises in the presence of intrinsic SO interaction and is gradually destroyed by the Rashba SO interaction and disorder fluctuation. We have numerically determined the phase boundaries separating integer QSHE and spin Hall liquid. We have found that when Vso≥0.2t with t the hopping constant the energy gap needed for the integer QSHE is the largest satisfying |E|<t. For smaller Vso the energy gap decreases linearly. In the presence of Rashba SO interaction or disorders, the energy gap diminishes. With Rashba SO interaction the integer QSHE is robust at the largest energy within the energy gap while at the smallest energy within the energy gap the integer QSHE is insensitive to the disorder.-
dc.languageengen_HK
dc.publisherInstitute of Physics Publishing. The Journal's web site is located at http://www.iop.org/journals/nanoen_HK
dc.relation.ispartofNanotechnologyen_HK
dc.titleA variant transfer matrix method suitable for transport through multi-probe systemsen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0957-4484&volume=18&spage=435402: 1&epage=6&date=2007&atitle=A+variant+transfer+matrix+method+suitable+for+transport+through+multi-probe+systemsen_HK
dc.identifier.emailWang, J: jianwang@hkusub.hku.hken_HK
dc.identifier.authorityWang, J=rp00799en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1088/0957-4484/18/43/435402-
dc.identifier.scopuseid_2-s2.0-36048949686-
dc.identifier.hkuros137989en_HK
dc.identifier.spagearticle no. 435402-
dc.identifier.epagearticle no. 435402-
dc.identifier.isiWOS:000249981900002-

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