Multi-band conduction behaviour at the interface of LaAlO3/SrTiO3 heterostructures

V.K. Guduru, A. McCollam, J.C. Maan, U. Zeitler, Sander Wenderich, Michelle Kruize, Alexander Brinkman, Mark Huijben, Gertjan Koster, David H.A. Blank, Augustinus J.H.M. Rijnders, H. Hilgenkamp

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Abstract

We have measured the Hall resistance and magneto-resistance (MR) of LaAlO3/SrTiO3 heterojunctions at magnetic fields up to 30 T in a temperature range T = 4 K to 70 K. For temperature below 7 K and above 50 K the devices display linear Hall resistance, indicating that one type of charge carriers dominate the transport. For temperatures between 10 K and 40 K, the Hall resistance is strongly non-linear, and is accompanied by a large positive MR, which is governed by the component of magnetic field normal to the interface. This behaviour in the intermediate temperature regime can be related to thermally activated high-mobility carriers.
Original languageUndefined
Pages (from-to)437-440
Number of pages4
JournalJournal of the Korean Physical Society
Volume63
DOIs
Publication statusPublished - 2013

Keywords

  • METIS-301547
  • IR-90113

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