Possible new bubble phases of two-dimensional electrons in higher Landau levels

Abstract

We argue that, due to the specific form of the interaction potential between electronic guiding centers, a bubble crystal (BC) with basis may be energetically more favorable than the usual bubble solid. This new BC has well-defined normal eigenmodes, and remains energetically favorable when the effects of finite sample thickness and of screening by electrons in lower LLs are taken into account.

4 pages, 4 figures; to appear in the Proceedings of the 16th International Conference on High Magnetic Fields in Semiconductor Physics (SemiMag-16)