Transport Spectroscopy of the Field Induced Cascade of Lifshitz Transitions in YbRh2Si2

30 Aug 2019 Pourret Alexandre Sharapov Sergei G. Matsuda Tatsuma D. Knebel Georg Zwicknagl Gertrud Varlamov Andrey A.

A series of strong anomalies in the thermoelectric power is observed in the heavy fermion compound YbRh$_2$Si$_2$ under the effect of magnetic field varying in the range from 9.5~T to 13~T. We identify these features with a sequence of topological transformations of the sophisticated Fermi surface of this compound, namely a cascade of Lifshitz topological transitions... (read more)

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