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

TL;DR

This paper proposes a new type of bubble crystal phase for two-dimensional electrons in higher Landau levels, which may be more stable than traditional bubble solids due to the specific interaction potential.

Contribution

It introduces a novel bubble crystal with a basis, demonstrating its energetic favorability and well-defined eigenmodes under realistic conditions.

Findings

New bubble crystal phase is energetically favorable.

The phase remains stable with finite thickness and screening effects.

Normal eigenmodes are well-defined in the new phase.

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.