Effects of Quantum-Well Inversion Asymmetry on Electron-Nuclear Spin Coupling in the Fractional Quantum Hall Regime

Abstract

We examine effects of inversion asymmetry of a GaAs/Al0.3Ga0.7As quantum well (QW) on electron-nuclear spin coupling in the fractional quantum Hall (QH) regime. Increasing the QW potential asymmetry at a fixed Landau-level filling factor (nu) with gate voltages suppresses the current-induced nuclear spin polarization in the nu = 2/3 Ising QH ferromagnet, while it significantly enhances the nuclear spin relaxation at general nu. These findings suggest that mixing of different spin states due to the Rashba spin-orbit interaction strongly affects the electron-nuclear spin coupling.

15 pages, 4 figures

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Cited by in corpus (5)

• Electron Transport in Double Quantum Dot governed by Nuclear Magnetic Field
• Dynamic Nuclear Polarization and Nuclear Magnetic Resonance in the Simplest Pseudospin Quantum Hall Ferromagnet
• Experimental Studies of Scaling Behavior of a Quantum Hall System with a Tunable Landau Level Mixing
• Probing Quantum Hall Pseudospin Ferromagnet by Resistively Detected NMR
• Pump-probe nuclear spin relaxation study of the quantum Hall ferromagnet at filling factor nu = 2