Rashba induced magnetoconductance oscillations in the LaAlO3-SrTiO3 heterostructure

Abstract

We report measurements of the normal state in-plane magnetoconductance in gated LaAlO${}_3$-SrTiO${}_3$ samples. As the orientation of the magnetic field changes within the plane of the interface, the signal displays periodic oscillations with respect to the angle between the field and the direction of the current. We show that in the underdoped to optimally doped range, a Fermi surface reconstruction takes place due to the Rashba spin-orbit term and that the oscillations are due to a magnetic field induced opening and closing of a gap at the $\Gamma$ point for those Ti out-of-plane orbitals having their band minimum close to the Fermi energy of the system.

5 pages, 4 figures

References in corpus (3)

• Graphene field-effect-transistors with high on/off current ratio and large transport band gap at room temperature
• Electric Field Control of the LaAlO${}_3$/SrTiO${}_3$ Interface Ground State
• Avoiding the polarization catastrophe in LaAlO3 overlayers on SrTiO3(001) through a polar distortion

Cited by in corpus (13)

• Theory of spin-orbit coupling at LaAlO3/SrTiO3 interfaces and SrTiO3 surfaces
• Topological superconductivity and unconventional pairing in oxide interfaces
• Control of a two-dimensional electron gas on SrTiO3(111) by atomic oxygen
• Giant negative magnetoresistance driven by spin-orbit coupling at the LAO/STO interface
• Giant Oscillating Thermopower at Oxide Interfaces
• Current-driven spin orbit field in LaAlO3/SrTiO3 heterostructures
• Weak-localization and spin-orbit interaction in side-gate field effect devices at the LaAlO${}_3$/SrTiO${}_3$ interface
• Magnetic and Superconducting Ordering at LaAlO3/SrTiO3 Interfaces
• Large modulation of the Shubnikov-de Haas oscillations by the Rashba interaction at the LaAlO${}_3$/SrTiO${}_3$ interface
• Magneto-transport study of top- and back-gated LaAlO${}_3$/SrTiO${}_3$ heterostructures
• Anomalous Transport in Sketched Nanostructures at the LaAlO3/SrTiO3 Interface
• Two-Dimensional Large Gap Topological Insulators with Large Rashba Spin-Orbit Coupling in Group-IV films
• Anomalous transport near the Lifshitz transition at the LaAlO${}_3$/SrTiO${}_3$ interface