Shubnikov-de Haas oscillations in SrTiO3\LaAlO3 interface
M. Ben Shalom, A. Ron, A. Palevski, and Y. Dagan
TL;DR
This paper reports the observation and analysis of Shubnikov-de Haas oscillations in SrTiO3/LaAlO3 interfaces, revealing complex carrier dynamics and multiple degeneracies through magnetic oscillation measurements.
Contribution
It provides new experimental evidence of quantum oscillations in SrTiO3/LaAlO3 interfaces and analyzes their evolution with gate voltage and temperature.
Findings
Oscillations consistent with Shubnikov-de Haas theory
Multiple carrier contributions inferred from Hall data
Evidence of multiple valley and spin degeneracy
Abstract
Quantum magnetic oscillations in SrTiO3/\LaAlO3 interface are observed. The evolution of their frequency and amplitude at various gate voltages and temperatures is studied. The data are consistent with the Shubnikov de-Haas theory. The Hall resistivity rho exhibits nonlinearity at low magnetic field. It is fitted assuming multiple carrier contributions. The comparison between the mobile carrier density inferred from the Hall data and the oscillation frequency suggests multiple valley and spin degeneracy. The small amplitude of the oscillations is discussed in the framework of the multiple band scenario.
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