Spin gap in the 2D electron system of GaAs/AlGaAs single heterojunctions in weak magnetic fields

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We study the interaction-enhanced spin gaps in the two-dimensional electron gas confined in GaAs/AlGaAs single heterojunctions subjected to weak magnetic fields. The values are obtained from the chemical potential jumps measured by magnetocapacitance. The gap increase with parallel magnetic field indicates that the lowest-lying charged excitations are accompanied with a single spin flip at the odd-integer filling factor nu=1 and nu=3, in disagreement with the concept of skyrmions.
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Strongly Correlated Electrons

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http://salesiana.dossiersoluciones.com/handle/123456789/24911

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/cond-mat/0409549
 http://arxiv.org/abs/cond-mat/0409549
 Phys. Rev. B 72, 035344 (2005)
 doi:10.1103/PhysRevB.72.035344

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arXiv