Fourier Electron Optics with Massless Dirac Fermions Scattered by Quantum Dot Lattice

• URL: http://arxiv.org/abs/2402.11259v1
• Date: Sat, 17 Feb 2024 12:15:33 GMT
• Title: Fourier Electron Optics with Massless Dirac Fermions Scattered by Quantum Dot Lattice
• Authors: Partha Sarathi Banerjee, Rahul Marathe and Sankalpa Ghosh
• Abstract summary: We introduce Fourier electron optics (FEO) with massless Dirac fermions (MDF) in graphene under ambient conditions. We establish an electronic analogue of Babinet's principle in optics.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: The field of electron optics exploits the analogy between the movement of electrons or charged quasiparticles, primarily in two-dimensional materials subjected to electric and magnetic (EM) fields and the propagation of electromagnetic waves in a dielectric medium with varied refractive index. We significantly extend this analogy by introducing Fourier electron optics (FEO) with massless Dirac fermions (MDF), namely the charge carriers of single-layer graphene under ambient conditions, by considering their scattering from a two-dimensional quantum dot lattice (TDQDL) treated within Lippmann-Schwinger formalism. By considering the scattering of MDF from TDQDL with a cavity, as well as the moir\'{e} pattern of twisted TDQDLs, we establish an electronic analogue of Babinet's principle in optics. Exploiting the similarity of the resulting differential scattering cross-section with the Fraunhofer diffraction pattern, we construct a dictionary for such FEO. Subsequently, we evaluate the resistivity of such scattered MDF using the Boltzmann approach as a function of the angle made between the direction of propagation of these charge-carriers and the symmetry axis of the dot-lattice, and Fourier analyze them to show that the spatial frequency associated with the angle-resolved resistivity gets filtered according to the structural changes in the dot lattice, indicating wider applicability of FEO of MDF.

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