| DOI | Trouver le DOI : https://doi.org/10.1103/PhysRevB.86.115309 |
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| Auteur | Rechercher : Studenikin, S. A.1; Rechercher : Granger, G.2; Rechercher : Kam, A.3; Rechercher : Sachrajda, A. S.1; Rechercher : Wasilewski, Z. R.3; Rechercher : Poole, P. J.3 |
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| Affiliation | - Conseil national de recherches du Canada. Technologies de sécurité et de rupture
- Conseil national de recherches du Canada. Science des mesures et étalons
- Conseil national de recherches du Canada. Technologies de l'information et des communications
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| Format | Texte, Article |
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| Résumé | This paper reports on the observation and analysis of magnetotransport phenomena in the nonlinear differential resistance rxx=dVxx/dI of high-mobility In xGa 1-xAs/InP and GaAs/Al xGa 1-xAs Hall bar samples driven by direct current I dc. Specifically, it is observed that Shubnikov-de Haas (SdH) oscillations at large filling factors invert their phase at sufficiently large values of Idc. This phase inversion is explained as being due to an electron heating effect. In the quantum Hall effect regime the rxx oscillations transform into diamond-shaped patterns with different slopes corresponding to odd and even filling factors. The diamond-shaped features at odd filling factors can be used as a probe to determine spin energy gaps. A zero current anomaly (ZCA) which manifests itself as a narrow dip in the rxx(Idc) characteristics at zero current is also observed. The ZCA effect strongly depends upon temperature, vanishing above 1 K while the transport diamonds persist to higher temperatures. The transport diamonds and ZCA are fully reproduced in a higher mobility GaAs/AlGaAs Hall bar structure confirming that these phenomena reflect intrinsic properties of two-dimensional systems. |
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| Date de publication | 2012-09-05 |
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| Dans | |
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| Langue | anglais |
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| Publications évaluées par des pairs | Oui |
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| Numéro NPARC | 21270157 |
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| Exporter la notice | Exporter en format RIS |
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| Signaler une correction | Signaler une correction (s'ouvre dans un nouvel onglet) |
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| Identificateur de l’enregistrement | 503fb0e7-8d63-49fe-b58a-108eb96921ed |
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| Enregistrement créé | 2014-01-06 |
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| Enregistrement modifié | 2020-04-21 |
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