Magnetic and transport signatures of Rashba spin-orbit coupling on the ferromagnetic Kondo lattice model in two dimensions
arXiv:1405.1240 · doi:10.1103/PhysRevB.90.085107
Abstract
Motivated by emergent phenomena at oxide surfaces and interfaces, particularly those involving transition metal oxides with perovskite crystal structure such as LaTiO3/SrTiO3, we examine the ferromagnetic Kondo lattice model (FKLM) in the presence of a Rashba spin-orbit coupling (RSOC). Using numerical techniques, under the assumption that the electrons on localized orbitals may be treated as classical continuum spins, we compute various charge, spin and transport properties on square clusters at zero temperature. We find that the main effect of the RSOC is the destruction of the ferromagnetic state present in the FKLM at low electron fillings, with the consequent suppression of conductivity. In addition, near half-filling the RSOC leads to a departure of the antiferromagnetic state of the FKLM with a consequent reduction to the intrinsic tendency to electronic phase separation. The interplay between phase separation on one side, and magnetic and transport properties on the other, is carefully analyzed as a function of the RSOC/hopping ratio.
final version, accepted for publication in Phys. Rev. B
References in corpus (8)
- The electronic properties of graphene
- Monte Carlo study of an unconventional superconducting phase in Ir-oxide J_{eff}=1/2 Mott insulators induced by carrier doping
- Electron and hole Dirac cone states in-pairs in Ba(FeAs) confirmed by magnetoresistance
- Intrinsic instability of electronic interfaces with strong Rashba coupling
- Orbital liquid in ferromagnetic manganites: The orbital Hubbard model for electrons
- Doping dependence of spin and orbital correlations in layered manganites
- Multi-orbital physics in Fermi liquids prone to magnetic order
- Spin-spiral inhomogeneity as the origin of ferroelectricity in orthorhombic manganites