Scientific article
Open access

Two-Dimensional Quantum Oscillations of the Conductance at LaAlO3/SrTiO3 Interfaces

Published inPhysical review letters, vol. 105, no. 23, 236802
Publication date2010

We report on a study of magnetotransport in LaAlO3/SrTiO3 interfaces characterized by mobilities of the order of several thousands cm2/V s. We observe Shubnikov–de Haas oscillations whose period depends only on the perpendicular component of the magnetic field. This observation directly indicates the formation of a two-dimensional electron gas originating from quantum confinement at the interface. From the temperature dependence of the oscillation amplitude we extract an effective carrier mass m*≃1.45me. An electric field applied in the back-gate geometry increases the mobility, the carrier density, and the oscillation frequency.

Citation (ISO format)
CAVIGLIA, Andrea et al. Two-Dimensional Quantum Oscillations of the Conductance at LaAlO<sub>3</sub>/SrTiO<sub>3</sub> Interfaces. In: Physical review letters, 2010, vol. 105, n° 23, p. 236802. doi: 10.1103/PhysRevLett.105.236802
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Article (Published version)
ISSN of the journal0031-9007

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