Impact of Kondo correlations and spin-orbit coupling on spin-polarized transport in carbon nanotube quantum dot
- Resource Type
- Working Paper
- Authors
- Krychowski, D.; Lipiński, S.
- Source
- J. Mag. Mag. Mat. 546, 168795 (2022)
- Subject
- Condensed Matter - Mesoscale and Nanoscale Physics
- Language
Spin polarized transport through a quantum dot coupled to ferromagnetic electrodes with noncollinear magnetizations is discussed in terms of nonequilibrium Green functions formalism in the finite-U slave boson mean field approximation. The difference of orientations of the magnetizations of electrodes opens off-diagonal spin-orbital transmission and apart from spin currents of longitudinal polarization also spin-flip currents appear. We also study equilibrium pure spin current at zero bias and discuss its dependence on magnetization orientation, spin-orbit coupling strength and gate voltage. Impact of these factors on tunneling magnetoresistance (TMR) is also undertaken. In general spin-orbit coupling weakens TMR, but it can change its sign.
Comment: 5 pages, 4 figures