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Article Dans Une Revue Physical Review Letters Année : 2010

Two-Dimensional Quantum Oscillations of the Conductance at LaAlO 3 / SrTiO 3 Interfaces

Résumé

We report on a study of magnetotransport in LaAlO 3 =SrTiO 3 interfaces characterized by mobilities of the order of several thousands cm 2 =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 à ' 1:45m e. An electric field applied in the back-gate geometry increases the mobility, the carrier density, and the oscillation frequency.

Dates et versions

hal-02076466 , version 1 (01-04-2019)

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A. D Caviglia, S. Gariglio, C. Cancellieri, B. Sacépé, A. Fête, et al.. Two-Dimensional Quantum Oscillations of the Conductance at LaAlO 3 / SrTiO 3 Interfaces. Physical Review Letters, 2010, 105 (23), pp.236802. ⟨10.1103/PhysRevLett.105.236802⟩. ⟨hal-02076466⟩
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