Regensburg 2013 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 20: Transport: Spincaloric Transport (jointly with MA)

TT 20.14: Vortrag

Montag, 11. März 2013, 18:30–18:45, H22

Scattering-Independent Contribution to the Anomalous Nernst Effect — •Jürgen Weischenberg, Frank Freimuth, Stefan Blügel, and and Yuriy Mokrousov — Peter Grünberg Institut & Institute for Advanced Simulation, Forschungszentrum Jülich and JARA, 52425 Jülich, Germany

In analogy to the electric conductivity tensor [1], the thermoelectric- or Peltier conductivity tensor may be decomposed into a scattering-dependent and a scattering-independent term. Using the full-potential linearized augmented plane-wave method within the density functional theory, we compute all the contributions to the scattering-independent term, namely the intrinsic contribution and the side-jump contribution, and show that in ferromagnetic materials they are both of equal importance. In particular, the comparison of our theoretical values with experiments suggests that the anomalous Nernst effect in Fe, Co, Ni, FePd and FePt is largely caused by the scattering-independent term [2]. Moreover, the consequences of magnetic disorder on thermoelectric transport phenomena are also discussed. Financial support by the HGF-YIG Programme VH-NG-513 is gratefully acknowledged. J. W. was supported under grant SPP 1538 SpinCaT by the German Science Foundation.

[1] J. Weischenberg, F. Freimuth, J. Sinova, S. Blügel and Y. Mokrousov, PRL 107, 106601 (2011)

[2] J. Weischenberg, F. Freimuth, S. Blügel and Y. Mokrousov, arXiv:1210.8283 [cond-mat.mtrl-sci]