Spin polarization in quantum Hall state obtained by Kerr rotation spectra

Journal Article · Fri Dec 23 04:00:00 EST 2011 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.3666539· OSTI ID:21612423

Ito, H; Seo, M; Fukuoka, D; Oto, K; Muro, K ^[1]; Hirayama, Y ^[2]; Kumada, N ^[3]

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1. Graduate School of Science, Chiba University, Chiba (Japan)
2. Graduate School of Science, Tohoku University, Sendai (Japan)
3. NTT Basic Research Laboratories, NTT Corporation, Atsugi (Japan)

We developed a novel system for a high sensitive measurement of Kerr rotation spectra, and Kerr rotation spectra of quantum Hall system in AlGaAs/GaAs 17 nm quantum well were measured. Spin polarization of quantum Hall states was obtained by integrating the spectra, since Kerr rotation spectra reflect spin population of electrons. The spin polarization decreased rapidly on both sides of {nu} = 1, which is ascribed to Skyrmion effect. However, the spin polarization present a flat region around {nu} = 1 which means a quantum Hall ferromagnet is not fully spin polarized.

• OSTI ID: 21612423
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 1399; ISSN APCPCS; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
77 NANOSCIENCE AND NANOTECHNOLOGY
ALUMINIUM ARSENIDES
ALUMINIUM COMPOUNDS
ANGULAR MOMENTUM
ARSENIC COMPOUNDS
ARSENIDES
ELECTRONS
ELEMENTARY PARTICLES
FERMIONS
FERROMAGNETISM
GALLIUM ARSENIDES
GALLIUM COMPOUNDS
INTERFACES
LEPTONS
MAGNETISM
MAGNETO-OPTICAL EFFECTS
MOTION
NANOSTRUCTURES
NUCLEON-NUCLEON POTENTIAL
ORIENTATION
PARTICLE PROPERTIES
PNICTIDES
POLARIZATION
POTENTIALS
QUANTUM STATES
QUANTUM WELLS
QUASI PARTICLES
ROTATION
SKYRME POTENTIAL
SOLITONS
SPECTRA
SPIN
SPIN ORIENTATION