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Título: | Anomalous ballistic transport in disordered bilayer graphene: A Dirac semimetal induced by dimer vacancies |
Autor: | Tuan, Dinh van CSIC; Roche, Stephan CSIC ORCID | Fecha de publicación: | 2016 | Editor: | American Physical Society | Citación: | Physical Review B 93(4): 041403(R) (2016) | Resumen: | We report anomalous quantum transport features in bilayer graphene in the presence of a random distribution of structural vacancies. By using an efficient real-space Kubo-Greenwood transport methodology, the impact of a varying density of dimer versus nondimer vacancies is investigated in very large scale disordered models. While nondimer vacancies are shown to induce localization regimes, dimer vacancies result in an unexpected ballistic regime whose energy window surprisingly enlarges with increasing impurity density. Such counterintuitive phenomenon is explained by the formation of an effective linear dispersion in the bilayer band structure, which roots in the symmetry breaking effects driven by dimer vacancies, and provides a realization of Dirac semimetals in high dimension. | Versión del editor: | http://dx.doi.org/10.1103/PhysRevB.93.041403 | URI: | http://hdl.handle.net/10261/159305 | DOI: | 10.1103/PhysRevB.93.041403 | Identificadores: | doi: 10.1103/PhysRevB.93.041403 issn: 2469-9950 e-issn: 2469-9969 |
Aparece en las colecciones: | (CIN2) Artículos |
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