The absorption spectrum around nu=1: evidence for a small size Skyrmion

Abstract

We measure the absorption spectrum of a two-dimensional electron system (2DES) in a GaAs quantum well in the presence of a perpendicular magnetic field. We focus on the absorption spectrum into the lowest Landau Level around nu=1. We find that the spectrum consists of bound electron-hole complexes, trion and exciton like. We show that their oscillator strength is a powerful probe of the 2DES spatial correlations. We find that near nu=1 the 2DES ground state consists of Skyrmions of small size (a few magnetic lengths).

arXiv commentTo be published in Phys Rev Lett. To be presented in ICSP2004, Flagstaff, Arizona. 4 figures (1 of them in color). 5 pages

References in corpus (5)

• Evidence for Skyrmions and Single Spin Flips in the Integer Quantized Hall Effect
• Evidence of Skyrmion excitations about $\nu =1$ in n-Modulation Doped Single Quantum Wells by Inter-band Optical Transmission
• Charged exctions in the fractional quantum Hall regime
• Theory of Photoluminescence of the $\nu =1$ Quantum Hall State: Excitons, Spin-Waves and Spin-Textures
• The onset of exciton absorption in modulation doped GaAs quantum wells

Cited by in corpus (10)

• Evidence for Skyrmion crystallization from NMR relaxation experiments
• Polaron-Polaritons in the Integer and Fractional Quantum Hall Regimes
• Extra Spin-Wave mode in Quantum Hall systems. Beyond the Skyrmion Limit
• Absorption in the fractional quantum Hall regime: trion dichroism and spin polarization
• Optical excitations in compressible and incompressible two-dimensional electron liquids
• The Fermi edge singularity of spin polarized electrons
• Optically induced nuclear spin polarization in a single GaAs/AlGaAs quantum well probed by a resistance detection method in the fractional quantum Hall regime
• Circularly Polarized Resonant Rayleigh Scattering and Skyrmions in the $\nu$ = 1 Quantum Hall Ferromagnet
• Experimental and Theoretical Evidence for Extended Particle Models
• Spontaneous Transition to a Correlated Phase of Skyrmions Observed in Real Space