Quantum transport in graphene in presence of strain-induced pseudo-Landau levels

Mikkel Settnes, Nicolas Leconte, Jose E. Barrios-Vargas, Antti-Pekka Jauho, Stephan Roche

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Abstract

We report 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.
Original languageEnglish
Article number034005
Journal2D materials
Volume3
Issue number3
ISSN2053-1583
DOIs
Publication statusPublished - 2016

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