High field magneto-transport in two-dimensional electron gas LaAlO3/SrTiO3

Abstract

Transport properties of the complex oxide LaAlO3/SrTiO3 interface are investigated under high magnetic field (55T). By rotating the sample with respect to the magnetic field, the two-dimensional nature of charge transport is clearly established. Small oscillations of the agnetoresistance with altered periodicity are observed when plotted versus inverse magnetic field. We attribute this effect to Rashba spin-orbit coupling which remains consistent with large negative magnetoresistance when the field is parallel to the sample plane. A large inconsistency between the carrier density extracted from Shubnikov-de Haas analysis and from the Hall effect is explained by the contribution to transport of at least two bands with different mobility.

5 pages, 3 figures

References in corpus (8)

• Magnetic effects at the interface between nonmagnetic oxides
• Oxide Heterostructures for Efficient Solar Cells
• Rashba induced magnetoconductance oscillations in the LaAlO3-SrTiO3 heterostructure
• Giant negative magnetoresistance driven by spin-orbit coupling at the LAO/STO interface
• Liquid-Gated High Mobility and Quantum Oscillation of the Two-Dimensional Electron Gas at an Oxide Interface
• Large modulation of the Shubnikov-de Haas oscillations by the Rashba interaction at the LaAlO${}_3$/SrTiO${}_3$ interface
• Quantum longitudinal and Hall transport at the LaAlO3/SrTiO3 interface at low electron densities
• Long-range electronic reconstruction to a $d_{xz,yz}$-dominated Fermi surface below the LaAlO${}_3$/SrTiO${}_3$ interface

Cited by in corpus (12)

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• Aperiodic quantum oscillations in the two-dimensional electron gas at the LaAlO3/SrTiO3 interface
• Shubnikov-de Haas-like Quantum Oscillations in Artificial One-Dimensional LaAlO3/SrTiO3 Electron Channels
• Semiclassical theory of anisotropic transport at LaAlO3/SrTiO3 interfaces under in-plane magnetic field
• Electronic subbands in the a-LaAlO${}_3$/KTaO${}_3$ interface revealed by quantum oscillations in high magnetic fields
• Ionic modulation at the LaAlO${}_3$/KTaO${}_3$ interface for extreme high-mobility two-dimensional electron gas
• Quantum oscillations in 2D electron gases with spin-orbit and Zeeman interactions
• Unconventional quantum oscillations and evidence of nonparabolic electronic states in quasi-two-dimensional electron system at complex oxide interfaces
• Quantum oscillations in an optically-illuminated two-dimensional electron system at the LaAlO${}_3$/SrTiO${}_3$ interface
• Magnetotransport of a 2DEG with anisotropic Rashba interaction at the LaAlO${}_3$/SrTiO${}_3$ interface
• Fluctuations superconductivity and giant negative magnetoresistance in a gate voltage tuned 2D electron liquid with strong spin-orbit impurity scattering