Transmission phase lapses at zero energy in graphene quantum dots |
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| Authors: | M. Niţă M. Ţolea B. Ostahie |
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| Affiliation: | 1. National Institute of Materials Physics, , 77125 Bucharest‐Magurele, Romania;2. Faculty of Physics, University of Bucharest, , Romania |
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| Abstract: | We address theoretically the electronic transport through graphene quantum dots with the emphasis on the transmission phase. Analytical and numerical results are presented regarding the existence – or not – of a π lapse of the transmittance phase (and, consequentially, a Fano zero in the transmittance) at the charge neutrality point. A simple universal criterium is found, the phase lapses being always present if the contact sites belong to the same sub‐lattice. (© 2014 WILEY‐VCH Verlag GmbH &Co. KGaA, Weinheim) |
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| Keywords: | graphene quantum dots electronic transport two‐dimensional systems |
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