Wigner crystal in a two-dimensional electron system in the vicinity of filling factor 1/5: Acoustic studies

Abstract

By simultaneous measurements of the attenuation and velocity of surface acoustic waves propagating in proximity to a high-quality GaAs quantum well we study the complex AC conductance of the two-dimensional electron system. Focusing on the vicinity of the filling factor $\nu =1/5$ we confirm that the insulating states formed closely to this value of $\nu$ are pinned Wigner crystals.

6 pages, 6 figures

References in corpus (4)

• Evidence for Two Different Solid Phases of Two Dimensional Electrons in High Magnetic Fields
• Contactless Measurement of AC Conductance in Quantum Hall Structures
• Acoustoelectric effects in very high-mobility $p$-SiGe/Ge/SiGe heterostructure at low temperatures in high magnetic fields
• Dynamics of disordered quantum Hall crystals

Cited by in corpus (3)

• Melting of Wigner crystal in high-mobility $n$-GaAs/AlGaAs heterostructures at filling factors $0.18>\nu >0.125$: Acoustic studies
• A novel planar back-gate design to control the carrier concentrations in GaAs-based double quantum wells
• Evidence for Topological Protection Derived from Six-Flux Composite Fermions