High-order fractal states in graphene superlattices [Physics]

Graphene superlattices were shown to exhibit high-temperature quantum oscillations due to periodic emergence of delocalized Bloch states in high magnetic fields such that unit fractions of the flux quantum pierce a superlattice unit cell. Under these conditions, semiclassical electron trajectories become straight again, similar to the case of zero magnetic...

Source: Proceedings of the National Academy of Sciences - May 15, 2018 Category: Science Authors: R. Krishna Kumar, A. Mishchenko, X. Chen, S. Pezzini, G. H. Auton, L. A. Ponomarenko, U. Zeitler, L. Eaves, V. I. Fal’ko, A. K. Geim Tags: Physical Sciences Source Type: research