Goldstone mode stochastization in quantum Hall ferromagnet

Abstract

Experimental and theoretical studies of the coherent spin dynamics of two-dimensional GaAs/AlGaAs electron gas were performed. The system in the quantum Hall ferromagnet state exhibits a spin relaxation mechanism that is determined by many-particle Coulomb interactions. In addition to the spin exciton with changes in the spin quantum numbers of $\delta S=\delta S_z=-1$, the quantum Hall ferromagnet supports a Goldstone spin exciton that changes the spin quantum numbers to $\delta S=0$ and $\delta S_z=-1$, which corresponds to a coherent spin rotation of the entire electron system to a certain angle. The Goldstone spin exciton decays through a specific relaxation mechanism that is unlike any other collective spin state.

5 pages, 3 figures

References in corpus (5)

• Soft Spin Wave Near nu=1: Evidence for a Magnetic Instability in Skyrmion Systems
• Optical absorption to probe the quantum Hall ferromagnet at filling factor $\nu =1$
• Slow spin relaxation in a quantum Hall ferromagnet state
• Spin gap in the 2D electron system of GaAs/AlGaAs single heterojunctions in weak magnetic fields
• Goldstone Mode Relaxation in a Quantum Hall Ferromagnet due to Hyperfine Interaction with Nuclei

Cited by in corpus (4)

• Quantum Interference Controls the Electron Spin Dynamics in n-GaAs
• Anomalous magnetic suppression of spin relaxation in a two-dimensional electron gas in a GaAs/AlGaAs quantum well
• Spin-rotation mode in a quantum Hall ferromagnet
• Damping via the hyperfine interaction of a spin-rotation mode in a two-dimensional strongly magnetized electron plasma