Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1547526 | Physica E: Low-dimensional Systems and Nanostructures | 2006 | 4 Pages |
Abstract
We observe a strong dependence of the amplitude and field position of longitudinal resistivity (Ïxx) peaks in the spin-resolved integer quantum Hall regime on the spin orientation of the Landau level (LL) in which the Fermi energy resides. The amplitude of a given peak is maximal when the partially filled LL has the same spin as the lowest LL, and amplitude changes as large as an order of magnitude are observed as the sample is tilted in field. In addition, the field position of both the Ïxx peaks and plateau-plateau transitions in the Hall resistance shift depending on the spin orientation of the LLs. The spin dependence of the resistivity points to a new explanation for resistivity spikes, associated with first-order quantum Hall ferromagnetic transitions, that occur at the edges of quantum Hall states.
Related Topics
Physical Sciences and Engineering
Materials Science
Electronic, Optical and Magnetic Materials
Authors
K. Vakili, Y.P. Shkolnikov, E. Tutuc, N.C. Bishop, E.P. De Poortere, M. Shayegan,