2012/07/25 by E. Flekser, M. Ben Shalom, M. Kim +8 · 2 citations
Materials Science · Physics and Astronomy · #Astronomy #Computer science #Electronic and Structural Properties of Oxides #Ferroelectric and Piezoelectric Materials #Magnetic and transport properties of perovskites and related materials #Physics #Polar #cond-mat.mes-hall #cond-mat.str-el #cond-mat.supr-con
paper · pdf · doi:10.1103/physrevb.86.121104
5 pages, 5 figures
arxiv created 2012/07/25 · openalex publication_date 2012/09/11 · arxiv updated 2015/06/05 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
Anisotropic magnetoresistance and negative magnetoresistance for in-plane fields are compared for the LaAlO3/SrTiO3 interface and the symmetric Nb-doped SrTiO3 heterostructure. Both effects are exceptionally strong in LaAlO3/SrTiO3. 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 SrTiO3. These results clarify contradicting transport interpretations in SrTiO3 based heterostructures.