Collective depinning and sliding of a quantum Wigner solid in a 2D electron system
arXiv:2310.03145 · doi:10.1103/PhysRevB.109.L041114
Abstract
We report the observation of two-threshold voltage-current characteristics accompanied by a peak of broadband current noise between the two threshold voltages in the insulating state at low densities in the 2D electron system in ultra-high mobility SiGe/Si/SiGe heterostructures. The observed results can be described by a phenomenological theory of the collective depinning of elastic structures, which naturally generates a peak of a broadband current noise between the dynamic and static thresholds and changes to sliding of the solid over a pinning barrier above the static threshold. This gives compelling evidence for the electron solid formation in this electron system and shows the generality of the effect for different classes of electron systems.
arXiv commentAs published
References in corpus (25)
- Correlation energy and spin polarization in the 2D electron gas
- The low-density spin susceptibility and effective mass of mobile electrons in Si inversion layers
- Spin Susceptibility of an Ultra-Low Density Two Dimensional Electron System
- Indication of the ferromagnetic instability in a dilute two-dimensional electron system
- Sharp increase of the effective mass near the critical density in a metallic 2D electron system
- Measurements of the density-dependent many-body electron mass in 2D GaAs/AlGaAs Heterostructures
- Competing correlated states around the zero field Wigner crystallization transition of electrons in two-dimensions
- Pauli spin susceptibility of a strongly correlated two-dimensional electron liquid
- Critical Behavior of a Strongly Interacting 2D Electron System
- Strongly correlated two-dimensional plasma explored from entropy measurements
- Ultra-high mobility two-dimensional electron gas in a SiGe/Si/SiGe quantum well
- Transport evidence for a sliding two-dimensional quantum electron solid
- Evidence of a two-stage melting of Wigner solids in two dimensions
- Indication of band flattening at the Fermi level in a strongly correlated electron system
- Anisotropic, two-dimensional, disordered Wigner solid
- Quantum phase transition in ultrahigh mobility SiGe/Si/SiGe two-dimensional electron system
- Critical behaviour of thermopower and conductivity at the metal-insulator transition in high-mobility Si-MOSFETs
- Contrast between spin and valley degrees of freedom
- Moving crystal phases of a quantum Wigner solid in an ultra-high-quality 2D electron system
- Zero field Wigner crystal
- Vortex Washboard Voltage Noise in Type-II Superconductors
- Nonlinear Dynamics, Avalanches and Noise for Driven Wigner Crystals
- Spin independence of the strongly enhanced effective mass in ultra-clean SiGe/Si/SiGe two-dimensional electron system
- Noise and Thermal Depinning of Wigner Crystals
- Valley effects on the fractions in an ultrahigh mobility SiGe/Si/SiGe two-dimensional electron system
Cited by in corpus (4)
- Triple-top-gate technique for studying the strongly interacting 2D electron systems in heterostructures
- Stabilization of a two-dimensional quantum electron solid in perpendicular magnetic fields
- Inequivalence of the low-density insulating state and quantum Hall insulating states in a strongly correlated two-dimensional electron system
- Quantum Wigner solid in two-dimensional electron systems in semiconductors