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

0524521 - ÚJF 2021 RIV GB eng J - Journal Article
Contreras-Astorga, A. - Jakubský, Vít - Raya, A.
On the propagation of Dirac fermions in graphene with strain-induced inhomogeneous Fermi velocity.
Journal of Physics-Condensed Matter. Roč. 32, č. 29 (2020), č. článku 295301. ISSN 0953-8984. E-ISSN 1361-648X
R&D Projects: GA ČR GA19-07117S
Institutional support: RVO:61389005
Keywords : graphene * 2D materials * deflection * wave packets * bound states * mechanical deformations * inhomogenous Fermi velocity
OECD category: Condensed matter physics (including formerly solid state physics, supercond.)
Impact factor: 2.333, year: 2020
Method of publishing: Limited access
https://doi.org/10.1088/1361-648X/ab7e5b

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.
Permanent Link: http://hdl.handle.net/11104/0308869