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Article: A variant transfer matrix method suitable for transport through multi-probe systems
Title | A variant transfer matrix method suitable for transport through multi-probe systems |
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Authors | |
Issue Date | 2007 |
Publisher | Institute 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? |
Abstract | We 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 Identifier | http://hdl.handle.net/10722/81007 |
ISSN | 2023 Impact Factor: 2.9 2023 SCImago Journal Rankings: 0.631 |
ISI Accession Number ID |
DC Field | Value | Language |
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dc.contributor.author | Qiao, Z | en_HK |
dc.contributor.author | Wang, J | en_HK |
dc.date.accessioned | 2010-09-06T08:12:42Z | - |
dc.date.available | 2010-09-06T08:12:42Z | - |
dc.date.issued | 2007 | en_HK |
dc.identifier.citation | Nanotechnology, 2007, v. 18, article no. 435402 | en_HK |
dc.identifier.issn | 0957-4484 | en_HK |
dc.identifier.uri | http://hdl.handle.net/10722/81007 | - |
dc.description.abstract | We 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.language | eng | en_HK |
dc.publisher | Institute of Physics Publishing. The Journal's web site is located at http://www.iop.org/journals/nano | en_HK |
dc.relation.ispartof | Nanotechnology | en_HK |
dc.title | A variant transfer matrix method suitable for transport through multi-probe systems | en_HK |
dc.type | Article | en_HK |
dc.identifier.openurl | http://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+systems | en_HK |
dc.identifier.email | Wang, J: jianwang@hkusub.hku.hk | en_HK |
dc.identifier.authority | Wang, J=rp00799 | en_HK |
dc.description.nature | link_to_subscribed_fulltext | - |
dc.identifier.doi | 10.1088/0957-4484/18/43/435402 | - |
dc.identifier.scopus | eid_2-s2.0-36048949686 | - |
dc.identifier.hkuros | 137989 | en_HK |
dc.identifier.spage | article no. 435402 | - |
dc.identifier.epage | article no. 435402 | - |
dc.identifier.isi | WOS:000249981900002 | - |
dc.identifier.issnl | 0957-4484 | - |