Discovery of an insulating ferromagnetic phase of electrons in two dimensions

Abstract

This is a commentary on two papers (PNAS 117 (51) 32244-32250 (2020) and arXiv:2011.06721), which observed a series of ordering transitions in a strongly correlated two-dimensional electron system confined to a AlAs quantum well. We summarize the main discoveries (electron nematicity, insulating ferromagnetism, etc.) of them and speculate on $T-r_s$ phase diagram based on theoretical considerations.

5 pages, 1 figure, published in PNAS

References in corpus (2)

• Observation of Spontaneous Ferromagnetism in a Two-Dimensional Electron System
• Observation of spontaneous valley polarization of itinerant electrons

Cited by in corpus (4)

• Anisotropic, two-dimensional, disordered Wigner solid
• Interstitial-induced ferromagnetism in a two-dimensional Wigner crystal
• Robust Quantum Hall Ferromagnetism near a Gate-Tuned ν = 1 Landau Level Crossing
• Exchange Interactions of a Wigner Crystal in a Magnetic Field and Berry Curvature: Multi-Particle Tunneling through Complex Trajectories