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Rashba induced magnetoconductance oscillations in the LaAlO3-SrTiO3 heterostructure

A. Fête, S. Gariglio, A. D. Caviglia, J.-M. Triscone, and M. Gabay
Phys. Rev. B 86, 201105(R) – Published 26 November 2012
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Abstract

We report measurements of the normal state in-plane magnetoconductance in gated LaAlO3-SrTiO3 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 Γ point for those Ti out-of-plane orbitals having their band minimum close to the Fermi energy of the system.

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  • Received 23 March 2012

DOI:https://doi.org/10.1103/PhysRevB.86.201105

©2012 American Physical Society

Authors & Affiliations

A. Fête1, S. Gariglio1, A. D. Caviglia1,2, J.-M. Triscone1, and M. Gabay3

  • 1Département de Physique de la Matière Condensée, University of Geneva, 24 Quai Ernest-Ansermet, 1211 Genève 4, Switzerland
  • 2Max-Planck Research Group for Structural Dynamics–Center for Free Electron Laser Science, University of Hamburg, Hamburg, Germany
  • 3Laboratoire de Physique des Solides, Bâtiment 510, Université Paris-Sud 11, Centre d’Orsay, 91405 Orsay Cedex, France

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Issue

Vol. 86, Iss. 20 — 15 November 2012

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