The Cyclotron Spin-Flip Mode as the Lowest-Energy Excitation of Unpolarized Integer Quantum Hall States

Abstract

The cyclotron spin-flip modes of spin unpolarized integer quantum Hall states ($\nu =2,4$) have been studied with inelastic light scattering. The energy of these modes is significantly smaller compared to the bare cyclotron gap. Second order exchange corrections are held responsible for a negative energy contribution and render these modes the lowest energy excitations of unpolarized integer quantum Hall states.

Published: Phys. Rev. B 72, 073304 (2005)

References in corpus (6)

• Observation of Collective Excitations of the Dilute 2D Electron System
• Skyrmions in Quantum Hall Systems with Realistic Force-Laws
• Zero-Momentum Cyclotron Spin-Flip Mode in a Spin-Unpolarized Quantum Hall System
• Activation Energy in a Quantum Hall Ferromagnet and Non-Hartree-Fock Skyrmions
• Sound and Heat Absorption by a 2D Electron Gas in an Odd-Integer Quantized-Hall Regime
• Auger-like Relaxation of Inter-Landau-Level Magneto-Plasmon Excitations in the Quantised Hall Regime

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• Artificially constructed plasmaron and plasmon-exciton molecule in 2D-metals
• Extremely Slow Spin Relaxation in a Spin-Unpolarized Quantum Hall System
• Three-particle electron-hole complexes in two-dimensional electron systems
• Antiphased Cyclotron-Magnetoplasma Mode in a Quantum Hall System
• Stochastization of long living spin-cyclotron excitations in a spin-unpolarised quantum Hall system
• Observation of exchange Coulomb interactions in the quantum Hall state at nu=3
• Spin precession and spin waves in a chiral electron gas: beyond Larmor's theorem
• Spin-rotation mode in a quantum Hall ferromagnet