Web of Science: 36 citations, Scopus: 35 citations, Google Scholar: citations,
Multiple quantum phases in graphene with enhanced spin-orbit coupling : from the quantum spin hall regime to the spin hall effect and a robust metallic state
Cresti, Alessandro (IMEP-LAHC)
Dinh, Van Tuan (Universitat Autònoma de Barcelona. Departament de Física)
Soriano, David (Institut Català de Nanociència i Nanotecnologia)
Cummings, Aron (Institut Català de Nanociència i Nanotecnologia)
Roche, Stephan (Institut Català de Nanociència i Nanotecnologia)

Date: 2014
Abstract: We report an intriguing transition from the quantum spin Hall phase to the spin Hall effect upon segregation of thallium adatoms adsorbed onto a graphene surface. Landauer-Büttiker and Kubo-Greenwood simulations are used to access both edge and bulk transport physics in disordered thallium-functionalized graphene systems of realistic sizes. Our findings not only quantify the detrimental effects of adatom clustering in the formation of the topological state, but also provide evidence for the emergence of spin accumulation at opposite sample edges driven by spin-dependent scattering induced by thallium islands, which eventually results in a minimum bulk conductivity ∼4e2/h, insensitive to localization effects.
Note: Número d'acord de subvenció EC/FP7/604391
Note: Número d'acord de subvenció MINECO/SEV-2013-0295
Note: Número d'acord de subvenció MINECO/MAT2012-33911
Rights: Tots els drets reservats.
Language: Anglès
Document: article ; recerca ; acceptedVersion
Subject: Bulk conductivities ; Functionalized graphene ; Localization effect ; Quantum spin Hall phase ; Quantum spin halls ; Spin dependent scattering ; Spin-accumulations ; Spin-orbit couplings
Published in: Physical review letters, Vol. 113, issue 24 (Dec. 2014) , art. 246603, ISSN 1079-7114

DOI: 10.1103/PhysRevLett.113.246603


Postprint
12 p, 2.3 MB

The record appears in these collections:
Research literature > UAB research groups literature > Research Centres and Groups (research output) > Experimental sciences > Catalan Institute of Nanoscience and Nanotechnology (ICN2)
Articles > Research articles
Articles > Published articles

 Record created 2020-09-14, last modified 2020-12-10



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