| Issue |
EPL
Volume 115, Number 1, July 2016
|
|
|---|---|---|
| Article Number | 17005 | |
| Number of page(s) | 5 | |
| Section | Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties | |
| DOI | https://doi.org/10.1209/0295-5075/115/17005 | |
| Published online | 09 August 2016 | |
Negative huge magnetoresistance in high-mobility 2D electron gases: DC-current dependence
1 Escuela Politecnica Superior, Universidad Carlos III de Madrid - Madrid, 28911, Spain
2 Unidad Asociada al Instituto de Ciencia de Materiales, CSIC - Cantoblanco Madrid, 28049, Spain
3 Institut für Festkörperphysik, Leibniz Universität Hannover - Hannover, Germany
Received: 19 May 2016
Accepted: 20 July 2016
Two-dimensional electron gases with very high mobility show a huge or giant negative magnetoresistance at low temperatures and low magnetic fields. We present an experimental and theoretical work on the influence of the applied current on the negative huge magnetoresistance of these systems. We obtain an unexpected and strong nonlinear behavior consisting in an increase of the negative huge magnetoresistance with increasing current, in other words, for increasing current the magnetoresistance collapses at small magnetic fields. This nonlinearity is explained by the subtle interplay of elastic scattering within Landau levels and between Landau levels.
PACS: 73.40.-c – Electronic transport in interface structures / 78.67.-n – Optical properties of low-dimensional, mesoscopic, and nanoscale materials and structures
© EPLA, 2016
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