Magnetic Field Induced Insulating Phases at Large $r_s$

Abstract

Exploring a backgated low density two-dimensional hole sample in the large $r_s$ regime we found a surprisingly rich phase diagram. At the highest densities, beside the $\nu =1/3$, 2/3, and 2/5 fractional quantum Hall states, we observe both of the previously reported high field insulating and reentrant insulating phases. As the density is lowered, the reentrant insulating phase initially strengthens, then it unexpectedly starts weakening until it completely dissapears. At the lowest densities the terminal quantum Hall state moves from $\nu =1/3$ to $\nu =1$. The intricate behavior of the insulating phases can be explained by a non-monotonic melting line in the $\nu$-$r_s$ phase space.

References in corpus (8)

• Correlation lengths of Wigner crystal order in two dimensional electron system at high magnetic field
• Wigner Crystals in the lowest Landau level at low filling factors
• Laughlin-Jastrow-correlated Wigner crystal in a strong magnetic field
• Evidence for Two Different Solid Phases of Two Dimensional Electrons in High Magnetic Fields
• Variational quantum Monte Carlo study of two-dimensional Wigner crystals: exchange, correlation, and magnetic field effects
• Microscopic verification of topological electron-vortex binding in the lowest-Landau-level crystal state
• Possible observation of phase coexistence of the $\nu =1/3$ fractional quantum Hall liquid and a solid
• Quantum Correlated Interstitials and the Hall Resistivity of the Magnetically Induced Wigner Crystal

Cited by in corpus (19)

• Crystallization in the Fractional Quantum Hall Regime Induced by Landau-level Mixing
• Thermal and quantum melting phase diagrams for a magnetic-field-induced Wigner solid
• Tunneling-driven breakdown of the 331 state and the emergent Pfaffian and composite Fermi liquid phases
• Insulating phase of a two-dimensional electron gas in MgZnO/ZnO heterostructure below nu = 1/3
• Interplay between fractional quantum Hall liquid and crystal phases at low filling
• Connecting the Reentrant Insulating Phase and the Zero Field Metal-Insulator Transition in a 2D Hole System
• Wigner Crystallization in a Quasi-3D Electronic System
• Competition between fractional quantum Hall liquid and Wigner solid at small fillings: Role of layer thickness and Landau level mixing
• Evidence of gate-tunable topological excitations in two-dimensional electron systems
• Anomalous magnetoresistance peak in (110) GaAs two-dimensional holes: Evidence for Landau-level spin-index anticrossings
• Phase diagram for quantum Hall states in graphene
• Degenerate versus semi-degenerate transport in a correlated 2D hole system
• Quantum bubble defects in the lowest Landau level crystal
• Cyclotron Orbits of Composite Fermions in the Fractional Quantum Hall Regime
• Tuning the effects of Landau-level mixing on anisotropic transport in quantum Hall systems
• Developing fractional quantum Hall states at $\nu$ = $\frac{1}{7}$ and $\frac{2}{11}$ in the presence of significant Landau level mixing
• Interaction-driven quantum phase transitions between topological and crystalline orders of electrons
• Coexistence of two hole phases in high-quality $p$-GaAs/AlGaAs in the vicinity of Landau level filling factors $\nu$=1 and $\nu$=(1/3)
• Resistivity peak values at transition between fractional quantum Hall states