Shubnikov-de Haas oscillations in SrTiO3/LaAlO3 interface

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Abstract

Quantum magnetic oscillations in SrTiO3/LaAlO3 interface are observed in the magnetoresistance. We study their frequency as a function of gate voltage and the evolution of their amplitude with temperature. The data are consistent with the Shubnikov-de Haas theory. The Hall resistivity ρxy is nonlinear at low magnetic fields. ρxy is fitted assuming multiple carrier contributions. We infer the density of the mobile charge carriers from the oscillations frequency and from Hall measurements. The comparison between these densities suggests multiple valley and spin degeneracy. The small amplitude of the oscillation is discussed in the framework of the multiple band scenario.

Original languageEnglish
Article number206401
JournalPhysical Review Letters
Volume105
Issue number20
DOIs
StatePublished - 9 Nov 2010

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