Stabilization of a two-dimensional quantum electron solid in perpendicular magnetic fields

Abstract

We find that the double-threshold voltage-current characteristics in the insulating regime in the ultra-clean two-valley two-dimensional electron system in SiGe/Si/SiGe quantum wells are promoted by perpendicular magnetic fields, persisting to an order of magnitude lower voltages and considerably higher electron densities compared to the zero-field case. This observation indicates the perpendicular-magnetic-field stabilization of the quantum electron solid.

As published

References in corpus (9)

• Direct observation of a magnetic field-induced Wigner crystal
• Competing correlated states around the zero field Wigner crystallization transition of electrons in two-dimensions
• NMR profiling of quantum electron solids in high magnetic fields
• Ultra-high mobility two-dimensional electron gas in a SiGe/Si/SiGe quantum well
• Anisotropic, two-dimensional, disordered Wigner solid
• Moving crystal phases of a quantum Wigner solid in an ultra-high-quality 2D electron system
• Unusual anisotropy of inplane field magnetoresistance in ultra-high mobility SiGe/Si/SiGe quantum wells
• Collective depinning and sliding of a quantum Wigner solid in a 2D electron system
• Triple-top-gate technique for studying the strongly interacting 2D electron systems in heterostructures

Cited by in corpus (2)

• 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