Evidence for Two Different Solid Phases of Two Dimensional Electrons in High Magnetic Fields

Abstract

We have performed RF spectroscopy on very high quality two dimensional electron systems in the high magnetic field insulating phase, usually associated with a Wigner solid (WS) pinned by disorder. We have found two different resonances in the frequency dependent real diagonal conductivity spectrum and we interpret them as coming from \textit{two} different pinned solid phases (labeled as "WS-A" and "WS-B"). The resonance of WS-A is observable for Landau level filling $\nu$$<$2/9 (but absent around the $\nu$=1/5 fractional quantum Hall effect (FQHE)); it then \textit{crosses over} for $\nu$$<$0.18 to the different WS-B resonance which dominates the spectrum at $\nu$$<$0.125. Moreover, WS-A resonance is found to show dispersion with respect to the size of transmission line, indicating that WS-A has a large correlation length (exceeding $\sim$100 $\mu$m); in contrast no such behavior is found for WS-B. We suggest that quantum correlations such as those responsible for FQHE may play an important role in giving rise to such different solids.

4 pages, 3 figures

References in corpus (10)

• Transition from an electron solid to the sequence of fractional quantum Hall states at very low Landau level filling factor
• Correlation lengths of Wigner crystal order in two dimensional electron system at high magnetic field
• Pinned Wigner Crystals
• Microwave Resonance of 2D Wigner Crystal around integer Landau fillings
• Dynamical response of a weakly pinned two-dimensional Wigner crystal
• Dynamical response of a pinned two-dimensional Wigner crystal
• Microwave resonances of the bubble phases in 1/4 and 3/4 filled higher Landau levels
• Laughlin-Jastrow-correlated Wigner crystal in a strong magnetic field
• Variational quantum Monte Carlo study of two-dimensional Wigner crystals: exchange, correlation, and magnetic field effects
• Hamiltonian Theory of the Composite Fermion Wigner Crystal

Cited by in corpus (36)

• Crystallization in the Fractional Quantum Hall Regime Induced by Landau-level Mixing
• Competing Crystal Phases in the Lowest Landau Level
• Observation of pinning mode in Wigner solid of 1/3 fractional quantum Hall excitations
• Unconventional fractional quantum Hall states and Wigner crystallization in suspended Corbino graphene
• Tilt Induced Localization and Delocalization in the Second Landau Level
• Magnetophonons & type-B Goldstones from Hydrodynamics to Holography
• Observation of reentrant quantum Hall states in the lowest Landau level
• Interplay between fractional quantum Hall liquid and crystal phases at low filling
• Skyrme and Wigner crystals in graphene
• Theory of the collective magnetophonon resonance and melting of the field-induced Wigner solid
• Connecting the Reentrant Insulating Phase and the Zero Field Metal-Insulator Transition in a 2D Hole System
• Microwave spectroscopic observation of distinct electron solid phases in wide quantum wells
• Magnetic Field Induced Insulating Phases at Large $r_s$
• Unified microscopic approach to the interplay of pinned-Wigner-solid and liquid behavior of lowest-Landau-level states in the neighborhood of nu=1/3
• Local density of states of electron-crystal phases in graphene in the quantum Hall regime
• Nonlinear Dynamics, Avalanches and Noise for Driven Wigner Crystals
• Static and Dynamic Properties of Type-II Composite Fermion Wigner Crystals
• Microwave spectroscopic studies of the bilayer electron solid states at low Landau filling in a wide quantum well
• Evidence of gate-tunable topological excitations in two-dimensional electron systems
• Dynamic Response of Wigner Crystals
• Unequal Layer Densities in Bilayer Wigner Crystal at High Magnetic Field
• Competition between fractional quantum Hall liquid and electron solid phases in the Landau levels of multilayer graphene
• Microwave spectroscopic observation of a Wigner solid within the 1/2 fractional quantum Hall effect
• Pinned Bilayer Wigner Crystals with Pseudospin Magnetism
• Commensurability oscillations in the rf conductivity of unidirectional lateral superlattices: measurement of anisotropic conductivity by coplanar waveguide
• Analytical Theory of Strongly Correlated Wigner Crystals in the Lowest Landau Level
• Replica study of pinned bubble crystals
• Dynamics of the Wigner Crystal of Composite Particles
• Quantum bubble defects in the lowest Landau level crystal
• Broadband Microwave Spectroscopy for Two-Dimensional Material Systems
• Exotic Bilayer Crystals in a Strong Magnetic Field
• Wigner crystal in a two-dimensional electron system in the vicinity of filling factor 1/5: Acoustic studies
• Wigner solid pinning modes tuned by fractional quantum Hall states of a nearby layer
• Dynamical matrix of two-dimensional electron crystals
• Evidence for Topological Protection Derived from Six-Flux Composite Fermions
• Wigner solids of wide quantum wells near Landau filling $\nu =1$