Non-equilibrium fractional quantum Hall states visualized by optically detected MRI

Abstract

Using photoluminescence microscopy enhanced by MRI, we visualize in real space both electron and nuclear polarization occurring in non-equilibrium FQH liquids. We observe stripe-like regions comprising FQH excited states which discretely form when the FQH liquid is excited by a source-drain current. These regions are topologically protected and deformable, and give rise to bidirectionally polarized nuclear spins as spin-resolved electrons flow across their boundaries.

arXiv comment4 figures

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Cited by in corpus (9)

• Counter-propagating charge transport in the quantum Hall effect regime
• Negative-Temperature State Relaxation and Reservoir-Assisted Quantum Entanglement in Double Spin Domain Systems
• Spin helices in GaAs quantum wells: Interplay of electron density, spin diffusion, and spin lifetime
• Role of chiral quantum Hall edge states in nuclear spin polarization
• Dynamic nuclear polarization at high Landau levels in a quantum point contact
• Double Nuclear Spin Relaxation in Hybrid Quantum Hall Systems
• Pump-probe nuclear spin relaxation study of the quantum Hall ferromagnet at filling factor nu = 2
• Thermal Transport Imaging in the Quantum Hall Edge Channel
• Spontaneous Transition to a Correlated Phase of Skyrmions Observed in Real Space