Deutschmann, R. A. and Wegscheider, Werner and Rother, M. and Bichler, Max and Abstreiter, Gerhard and Albrecht, C. and Smet, J. H.
Quantum Interference in Artificial Band Structures.
Physical Review Letters (PRL) 86 (9), pp. 1857-1860.
Magnetotransport experiments on two-dimensional electron systems with an atomically precise, one-dimensional potential modulation reveal striking quantum interference oscillations. Within a semiclassical framework, they are recognized either as self-interference along closed orbits, many of them rendered possible by magnetic breakdown between Fermi contour segments of the artificial band structure, or as interference-enhanced backscattering. The known commensurability oscillations appear as a special case of the latter mechanism.