Siegert, Christoph ; Ghosh, Arindam ; Pepper, Michael ; Farrer, Ian ; Ritchie, David A. ; Anderson, David ; Jones, Geb A. C. (2008) Oscillatory Hall effect in high-mobility two-dimensional electron gases Physical Review B: Condensed Matter and Materials Physics, 78 (8). Article ID 081302. ISSN 1098-0121
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Official URL: https://journals.aps.org/prb/abstract/10.1103/Phys...
Related URL: http://dx.doi.org/10.1103/PhysRevB.78.081302
Abstract
We report an unexpected anomaly in the zero-field Hall coefficient of two-dimensional electron systems in high-mobility GaAs/AlGaAs heterostructures. Our device layout allows the investigation of mesoscopic systems with variable Fermi energy as well as with tunable Hall probes. At very low temperature, both positive and negative deviations from the noninteracting Hall coefficient γ0H are observed, which can be twice as large as γ0H itself. A distinct regularity in the deviations and their temperature dependence are interpreted as the spontaneous formation of localized spins and their indirect exchange interaction.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to American Physical Society. |
| ID Code: | 101558 |
| Deposited On: | 01 Feb 2018 10:07 |
| Last Modified: | 01 Feb 2018 10:07 |
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