Dynamic nuclear polarization induced by breakdown of fractional quantum Hall effect

Abstract

We study dynamic nuclear polarization (DNP) induced by breakdown of the fractional quantum Hall (FQH) effect. We find that voltage-current characteristics depend on current sweep rates at the quantum Hall states of Landau level filling factors $\nu$ = 1, 2/3, and 1/3. The sweep rate dependence is attributed to DNP occurring in the breakdown regime of FQH states. Results of a pump and probe experiment show that the polarities of the DNP induced in the breakdown regimes of the FQH states is opposite to that of the DNP induced in the breakdown regimes of odd-integer quantum Hall states.

4 pages, 4 figures

References in corpus (6)

• Electrically-Controlled Nuclear Spin Polarization and Relaxation by Quantum-Hall states
• A New Type of Electron Nuclear-Spin Interaction from Resistively Detected NMR in the Fractional Quantum Hall Effect Regime
• Electrical polarization of nuclear spins in a breakdown regime of quantum Hall effect
• Electrical coherent control of nuclear spins in a breakdown regime of quantum Hall effect
• Strong, Ultra-narrow Peaks of Longitudinal and Hall Resistances in the Regime of Breakdown of the Quantum Hall Effect
• Dynamic Nuclear Polarization in a Quantum Hall Corbino Disk

Cited by in corpus (7)

• Nuclear Spins in Nanostructures
• Electronic magnetization of a quantum point contact measured by nuclear magnetic resonance
• Dynamic Nuclear Polarization in the Fractional Quantum Hall Regime
• Current Induced Nuclear Spin Depolarization at Landau Level Filling Factor nu=1/2
• Dispersive line shape in the vicinity of the ν = 1 quantum Hall state: Coexistence of Knight shifted and unshifted resistively detected NMR responses
• Resistive detection of nuclear spins in a single quantum dot under Kondo effect regime
• Spatial gradient of dynamic nuclear spin polarization induced by breakdown of quantum Hall effect