Charged spin-texture excitations and the Hartree-Fock approximation in the quantum Hall effect

Journal Article · Sat Oct 15 00:00:00 EDT 1994 · Physical Review, B: Condensed Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.50.11018· OSTI ID:7167394

Fertig, H A ^[1]; Brey, L ^[2]; Cote, R ^[3]; MacDonald, A H ^[4]

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1. Department of Physics and Astronomy, University of Kentucky, Lexington, Kentucky 40506-0055 (United States)
2. Instituto de Ciencia de Materiales (CSIC), Universidad Autonoma C-12, 28049 Madrid (Spain)
3. Departement de Physique et Centre de Recherches en Physique du Solide, Universite de Sherbrooke, Sherbrooke, Quebec, J1K 2R1 (Canada)
4. Department of Physics, Indiana University, Bloomington, Indiana 47405 (United States)

We develop a Hartree-Fock approach to the charged spin-texture excitations (CSTE's) of the ferromagnetic incompressible ground state, which occurs in the quantum Hall effect at Landau-level filling factor [nu]=1. The CSTE's are the appropriate generalization of skyrmions to the situation when there is a nonzero Zeeman coupling. We find for Coulomb interactions that the charged spin-texture excitation energies are always smaller than the excitation energies of localized spin 1/2 quasiparticles and quasiholes. However, the amount by which the energy is lowered is quite small for typical experimental situations. The net spin of the CSTE's is always much larger than 1/2, suggesting that adding or removing charge from a filled Landau level rapidly degrades its spin polarization.

• OSTI ID: 7167394
• Journal Information: Physical Review, B: Condensed Matter; (United States), Vol. 50:15; ISSN 0163-1829
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
36 MATERIALS SCIENCE
CRYSTAL MODELS
HALL EFFECT
SUPERCONDUCTIVITY
GALLIUM ARSENIDES
FERROMAGNETISM
GROUND STATES
HARTREE-FOCK METHOD
QUANTUM MECHANICS
SPIN ORIENTATION
STATISTICAL MECHANICS
ZEEMAN EFFECT
ARSENIC COMPOUNDS
ARSENIDES
CALCULATION METHODS
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ENERGY LEVELS
GALLIUM COMPOUNDS
MAGNETISM
MATHEMATICAL MODELS
MECHANICS
ORIENTATION
PHYSICAL PROPERTIES
PNICTIDES
665410* - Superconductivity- (1992-)
665000 - Physics of Condensed Matter- (1992-)
360606 - Other Materials- Physical Properties- (1992-)