Dresden 2017 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
MA: Fachverband Magnetismus
MA 68: Poster 5
MA 68.21: Poster
Freitag, 24. März 2017, 09:30–13:00, P2-OG4
Absence of strong skew scattering in crystals with multi-sheeted Fermi surfaces — •Albert Hönemann1, Christian Herschbach1, Dmitry Fedorov2,1, Martin Gradhand3, and Ingrid Mertig1,2 — 1Martin Luther University Halle-Wittenberg, Halle, Germany — 2Max Planck Institute of Microstructure Physics, Halle, Germany — 3University of Bristol, Bristol, United Kingdom
Transport phenomena caused by spin-orbit coupling like spin Hall effect (SHE) [1] and anomalous Hall effect (AHE) [2] are highly interesting topics of current research. In magnetic materials both effects can be observed simultaneously to explore underlying microscopic processes.
Using an ab initio relativistic Kohn-Korringa-Rostoker method [3] to solve the linearized Boltzmann equation [4,5], we investigated SHE and AHE for Fe, Co and Ni crystals alloyed with transition metals or Bi. In the considered dilute alloys the dominant extrinsic contribution to both effects is caused by skew scattering [6]. Nevertheless, the strength of skew scattering in these systems is greatly reduced compared to others [7-9]. Our study attributes this to the number of sheets in the host system’s Fermi surface. We also discuss different relations between SHE and AHE present in the considered alloys.
[1] Sinova et al., Rev. Mod. Phys. 87, 1213 (2015); [2] Nagaosa et al., Rev. Mod. Phys. 82, 1539 (2010); [3] Gradhand et al., PRB 80, 224413 (2009); [4] Gradhand et al., PRL 104, 186403 (2010); [5] Zimmermann et al., PRB 90, 220403(R) (2014); [6] Lowitzer et al., PRL 106, 056601 (2011); [7] Gradhand et al., PRB 81, 245109 (2010); [8] Niimi et al., PRL 109, 156602 (2012); [9] Fedorov et al., PRB 88, 085116 (2013).