Topologically protected wave packets and quantum rings in silicene
arXiv:1906.02910 · doi:10.1103/PhysRevB.100.085306
Abstract
We study chiral wave packets moving along the zero-line of a symmetry breaking potential of vertical electric field in buckled silicene using an atomistic tight-binding approach with initial conditions set by an analytical solution of the Dirac equation. We demonstrate that the wave packet moves with a constant untrembling velocity and with a presevered shape along the zero line. Backscattering by the edge of the crystal is observed that appears with the transition of the packet from to valley or vice versa. We propose a potential profile with branching of the flip line that splits the wave packet and produces interference of the split parts that acts as a quantum ring. The transition time exhibits Aharonov-Bohm oscillations in the external magnetic field that are translated to conductance oscillations when the intervalley scattering is present within the ring.
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Cited by in corpus (6)
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