Quantum transport in graphene in presence of strain-induced pseudo-Landau levels
Settnes, Mikkel (Danmarks Tekniske Universitet. Department of Photonics Engineering)
Leconte, Nicolas (Institut Català de Nanociència i Nanotecnologia)
Barrios Vargas, José Eduardo (Institut Català de Nanociència i Nanotecnologia)
Jauho, Antti-Pekka (Danmarks Tekniske Universitet. Department of Photonics Engineering)
Roche, Stephan (Institut Català de Nanociència i Nanotecnologia)

Data:	2016
Resum:	Wereport on mesoscopic transport fingerprints in disordered graphene caused by strain-field induced pseudomagnetic Landau levels (pLLs). Efficient numerical real space calculations of the Kubo formula are performed for an ordered network of nanobubbles in graphene, creating pseudomagnetic fields up to several hundreds of Tesla, values inaccessible by real magnetic fields. Strain-induced pLLs yield enhanced scattering effects across the energy spectrum resulting in lower mean free path and enhanced localization effects. In the vicinity of the zeroth order pLL, we demonstrate an anomalous transport regime, where the mean free paths increases with disorder. We attribute this puzzling behavior to the low-energy sub-lattice polarization induced by the zeroth order pLL, which is unique to pseudomagnetic fields preserving time-reversal symmetry. These results, combined with the experimental feasibility of reversible deformation fields, open the way to tailor a metal-insulator transition driven by pseudomagnetic fields.
Ajuts:	European Commission 604391 Ministerio de Economía y Competitividad SEV-2013-0295 Ministerio de Economía y Competitividad MAT2012-33911
Drets:	Tots els drets reservats.
Llengua:	Anglès
Document:	Article ; recerca ; Versió acceptada per publicar
Matèria:	Graphene ; Strain ; Pseudomagnetic field ; Quantum transport
Publicat a:	2D Materials, Vol. 3, issue 3 (Jan. 2016) , art. 34005, ISSN 2053-1583

DOI: 10.1088/2053-1583/3/3/034005

Postprint 9 p, 1.1 MB

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