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Título: | 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 |
Autor: | Cresti, A.; Tuan, Dinh van CSIC; Soriano, David CSIC ORCID; Cummings, Aron W. CSIC ORCID; Roche, Stephan CSIC ORCID | Fecha de publicación: | 2014 | Editor: | American Physical Society | Citación: | Physical Review Letters 113(24): 246603 (2014) | Resumen: | 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. | Descripción: | Under the terms of the Creative Commons Attribution License 3.0 (CC-BY). | Versión del editor: | http://dx.doi.org/10.1103/PhysRevLett.113.246603 | URI: | http://hdl.handle.net/10261/131562 | DOI: | 10.1103/PhysRevLett.113.246603 | Identificadores: | doi: 10.1103/PhysRevLett.113.246603 issn: 0031-9007 e-issn: 1079-7114 |
Aparece en las colecciones: | (CIN2) Artículos |
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RobustMetallicState.pdf | 2,22 MB | Adobe PDF | Visualizar/Abrir |
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