Dresden 2014 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 85: Spincaloric Transport II (organized by MA)

TT 85.7: Vortrag

Donnerstag, 3. April 2014, 11:15–11:30, HSZ 04

Spin caloric transport in alloys from first-principles — •Sebastian Wimmer, Diemo Ködderitzsch, Kristina Chadova, and Hubert Ebert — Ludwig-Maximilians-Universität, München, Deutschland

A fully relativistic implementation of the Korringa-Kohn-Rostoker coherent potential approximation (KKR-CPA) band structure method [1] in conjunction with Kubo’s linear response theory is employed to investigate various transport properties of bulk transition metal alloys. Special emphasis is put on spin-orbit coupling induced phenomena of thermo(-magneto)-electric transport in para- as well as ferromagnetic systems such as spin and anomalous Nernst effects and the anisotropy of the Seebeck effect [2,3]. These transverse and longitudinal responses to a temperature gradient are compared to their respective (magneto-)electric counterparts, the spin and anomalous Hall effects and the anisotropic magnetoresistance. For the transverse effects a decomposition into intrinsic and extrinsic (skew scattering and side-jump) contributions is performed, based on vertex corrections and scaling laws.
[1] H. Ebert, D. Ködderitzsch, and J. Minár, Rep. Prog. Phys. 74, 096501 (2011).

[2] S. Wimmer, D. Ködderitzsch, K. Chadova, and H. Ebert, PRB 88, 201108(R) (2013).

[3] S. Wimmer, D. Ködderitzsch, and H. Ebert, arXiv:1311.2498 [cond-mat.mtrl-sci] (2013).