Pinning modes and interlayer correlation in high magnetic field bilayer Wigner solids

TL;DR

This study investigates pinning mode resonances in bilayer Wigner solids under high magnetic fields, revealing interlayer quantum correlations and the influence of fractional quantum Hall effects on the solid's properties.

Contribution

It demonstrates the presence of interlayer quantum correlations in bilayer Wigner solids at small interlayer separation and links these correlations to fractional quantum Hall states.

Findings

Interlayer correlations exist at small interlayer separation.

Resonance frequency decreases near fractional quantum Hall states.

Interlayer quantum effects influence Wigner solid behavior.

Abstract

We report studies of pinning mode resonances in the low total Landau filling (\nu) Wigner solid of a series of bilayer hole samples with negligible interlayer tunneling, and with varying interlayer separation d. Comparison of states with equal layer densities (p,p) to single layer states (p,0) produced {in situ} by biasing, indicates that there is interlayer quantum correlation in the solid at small d. Also, the resonance frequency at small d is decreased just near \nu=1/2 and 2/3, indicating the importance in the solid of correlations related to those in the fractional quantum Hall effects.