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Commensurability Effects in Hexagonal Antidot Lattices with Large Antidot Diameters

S. Meckler·T. Heinzel·A. Cavanna·G. Faini·U. Gennser·D. Mailly
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Abstract

The observation of a novel type of commensurability resonance in two-dimensional, hexagonal antidot lattices is reported. These resonances have a classical character and occur at magnetic fields above the resonance that corresponds to the cyclotron motion around a single antidot. The resonances are visible only for antidots with effective diameters larger than 50 % of the lattice constant. Simulations reveal that they originate from quasi-stable electron trajectories that bounce between three neighboring antidots. This interpretation is backed by the observation of large-period Aharonov-Bohm type oscillations at low temperatures.

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S. Meckler, T. Heinzel, A. Cavanna, G. Faini, U. Gennser, D. Mailly. 2005-04-28. Commensurability Effects in Hexagonal Antidot Lattices with Large Antidot Diameters. https://doi.org/10.1103/physrevb.72.035319

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