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Title

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

AuthorsCresti, A.; Tuan, Dinh van; Soriano, David ; Cummings, Aron W.; Roche, Stephan
Issue Date2014
PublisherAmerican Physical Society
CitationPhysical Review Letters 113(24): 246603 (2014)
AbstractWe 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.
DescriptionUnder the terms of the Creative Commons Attribution License 3.0 (CC-BY).
Publisher version (URL)http://dx.doi.org/10.1103/PhysRevLett.113.246603
URIhttp://hdl.handle.net/10261/131562
DOI10.1103/PhysRevLett.113.246603
Identifiersdoi: 10.1103/PhysRevLett.113.246603
issn: 0031-9007
e-issn: 1079-7114
Appears in Collections:(CIN2) Artículos
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