Gradinar, Diana and Mucha Kruczynski, Marcin and Schomerus, Henning and Falko, Vladimir (2013) Transport signatures of pseudomagnetic Landau levels in strained graphene ribbons. Physical review letters, 110: 266801. ISSN 1079-7114
PhysRevLett.110.266801.pdf - Published Version
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Abstract
In inhomogeneously strained graphene, low-energy electrons experience a valley-antisymmetric pseudomagnetic field which leads to the formation of localized states at the edge between the valence and conduction bands, understood in terms of peculiar n=0 pseudomagnetic Landau levels. Here we show that such states can manifest themselves as an isolated quadruplet of low-energy conductance resonances in a suspended stretched graphene ribbon, where clamping by the metallic contacts results in a strong inhomogeneity of strain near the ribbon ends.