2015/08/20 by Dinh Van Tuan, Stephan Roche · 2 citations
Chemistry · Materials Science · Physics and Astronomy · #Ballistic conduction #Bilayer #Bilayer graphene #Chemistry #Condensed matter physics #Diamond and Carbon-based Materials Research #Dimer #Dirac (video compression format) #Graphene #Graphene research and applications #Materials science #Nanotechnology #Physics #Quantum mechanics #Topological Materials and Phenomena #cond-mat.mes-hall
paper · pdf · doi:10.1103/physrevb.93.041403
published as Phys. Rev. B 93, 041403 (2016) · 5 pages, 4 figures
arxiv created 2015/08/20 · openalex publication_date 2016/01/05 · arxiv updated 2016/03/11 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
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.