We investigate the magnetic field dependent thermopower, thermal conductivity, resistivity and Hall effect in the heavy fermion metal YbRh2Si2. In contrast to reports on thermodynamic measurements, we find in total three transitions at high fields, rather than a single one at 10 T. Using the Mott formula together with renormalized band calculations, we identify Lifshitz transitions as their origin. The predictions of the calculations show that all experimental results rely on an interplay of a smooth suppression of the Kondo effect and the spin splitting of the flat hybridized bands.
@article{arxiv.1302.6867,
title = {Interplay between Kondo suppression and Lifshitz transitions in YbRh$_2$Si$_2$ at high magnetic fields},
author = {H. Pfau and R. Daou and S. Lausberg and H. R. Naren and M. Brando and S. Friedemann and S. Wirth and T. Westerkamp and U. Stockert and P. Gegenwart and C. Krellner and C. Geibel and G. Zwicknagl and F. Steglich},
journal= {arXiv preprint arXiv:1302.6867},
year = {2013}
}