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On the propagation of Dirac fermions in graphene with the strain-induced inhomogeneous Fermi velocity
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On the propagation of Dirac fermions in graphene with the strain-induced inhomogeneous Fermi velocity
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We consider systems described by the 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.
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