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On the propagation of Dirac fermions in graphene with strain-induced inhomogeneous Fermi velocity

On the propagation of Dirac fermions in graphene with strain-induced inhomogeneous Fermi velocity We consider systems described by a two-dimensional Dirac equation where the Fermi velocity is inhomogeneous as a consequence of mechanical deformations. We show that the mechanical deformations can lead to deflection and focusing of the wave packets. The analogy with known reflectionless quantum systems is pointed out. Furthermore, with the use of the qualitative spectral analysis, we discuss how inhomogeneous strains can be used to create waveguides for valley polarized transport of partially dispersionless wave packets. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of Physics: Condensed Matter IOP Publishing

On the propagation of Dirac fermions in graphene with strain-induced inhomogeneous Fermi velocity

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References (59)

Copyright
Copyright © 2020 IOP Publishing Ltd
ISSN
0953-8984
eISSN
1361-648X
DOI
10.1088/1361-648X/ab7e5b
Publisher site
See Article on Publisher Site

Abstract

We consider systems described by a two-dimensional Dirac equation where the Fermi velocity is inhomogeneous as a consequence of mechanical deformations. We show that the mechanical deformations can lead to deflection and focusing of the wave packets. The analogy with known reflectionless quantum systems is pointed out. Furthermore, with the use of the qualitative spectral analysis, we discuss how inhomogeneous strains can be used to create waveguides for valley polarized transport of partially dispersionless wave packets.

Journal

Journal of Physics: Condensed MatterIOP Publishing

Published: Jul 8, 2020

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