Microwave spectroscopic studies of the bilayer electron solid states at low Landau filling in a wide quantum well

Abstract

At the low Landau filling factor $(\nu )$ termination of the fractional quantum Hall effect (FQHE) series, two-dimensional electron systems (2DESs) exhibit an insulating phase that is understood as a form of pinned Wigner solid. Here we use microwave spectroscopy to probe the transition to the insulator for a wide quantum well (WQW) sample that can support single-layer or bilayer states depending on its overall carrier density, $n$. We find the insulator exhibits a resonance, which is characteristic of a bilayer solid. The resonance also reveals a pair of transitions within the solid, which are not accessible to dc transport measurements. As $n$ is biased deeper into the bilayer solid regime, the resonance grows in specific intensity, and the transitions within the insulator disappear. These behaviors are suggestive of a picture of the insulating phase as an emulsion of liquid and solid components.

References in corpus (17)

• Stability, dynamical properties and melting of a classical bi-layer Wigner Crystal
• Universal Aspects of Coulomb Frustrated Phase Separation
• Melting of a 2D Quantum Electron Solid in High Magnetic Field
• Evidence for a Bilayer Quantum Wigner Solid
• Wigner Crystals in the lowest Landau level at low filling factors
• Microwave Resonance of 2D Wigner Crystal around integer Landau fillings
• Dynamical response of a pinned two-dimensional Wigner crystal
• Dynamical response of a weakly pinned two-dimensional Wigner crystal
• NMR profiling of quantum electron solids in high magnetic fields
• Evidence for Two Different Solid Phases of Two Dimensional Electrons in High Magnetic Fields
• Wigner Crystals Phases in Bilayer Quantum Hall Systems
• Competing Crystal Phases in the Lowest Landau Level
• Wigner crystal states for the two-dimensional electron gas in a double quantum well system
• Microwave spectroscopic observation of distinct electron solid phases in wide quantum wells
• Pinning modes and interlayer correlation in high magnetic field bilayer Wigner solids
• Phase diagram of the Two-Component Fractional Quantum Hall Effect
• Unequal Layer Densities in Bilayer Wigner Crystal at High Magnetic Field

Cited by in corpus (12)

• Generalized Wigner crystallization in moiré materials
• Fractional quantum Hall effect energy gap: role of electron layer thickness
• Geometric Resonance of Composite Fermions near Bilayer Quantum Hall States
• Magnetically-defined topological edge plasmons in edgeless electron gas
• Fractional quantum Hall states versus Wigner crystals in wide quantum wells in the half-filled lowest and second Landau levels
• Observation of An Anisotropic Wigner Crystal
• Microwave spectroscopic observation of a Wigner solid within the 1/2 fractional quantum Hall effect
• Upper bound on the window of density occupied by microemulsion phases in two-dimensional electron systems
• Interaction between Surface Acoustic Wave and Quantum Hall Effects
• Exotic Bilayer Crystals in a Strong Magnetic Field
• Wigner solids of wide quantum wells near Landau filling $\nu =1$
• Resistively loaded coplanar waveguide for microwave measurements of induced carriers