Magnetotransport effects in polar versus non-polar SrTiO 3 based heterostructures

E. Flekser, M. Ben Shalom, M. Kim, C. Bell, Y. Hikita, H. Y. Hwang, Y. Dagan

Research output: Contribution to journalArticlepeer-review


Anisotropic magnetoresistance and negative magnetoresistance for in-plane fields are compared for the LaAlO 3/SrTiO 3 interface and the symmetric Nb-doped SrTiO 3 heterostructure. Both effects are exceptionally strong in LaAlO 3/SrTiO 3. We analyze their temperature, magnetic field, and gate voltage dependencies and find them to arise from a Rashba-type spin-orbit coupling with magnetic scatterers that have two contributions to their potential: spin exchange and Coulomb interaction. Atomic spin-orbit coupling is sufficient to explain the small effects observed in Nb-doped SrTiO 3. These results clarify contradicting transport interpretations in SrTiO 3 based heterostructures.

Original languageEnglish
Article number121104
JournalPhysical Review B - Condensed Matter and Materials Physics
Issue number12
StatePublished - 11 Sep 2012

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics


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