Interplay between Kondo suppression and Lifshitz transitions in YbRh${}_2$Si${}_2$ at high magnetic fields

Abstract

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.

5 pages, 4 figures

References in corpus (11)

• A Numerical Renormalization Group approach to Green's Functions for Quantum Impurity Models
• Multiple energy scales at a quantum critical point
• Thermal and Electrical Transport across a Magnetic Quantum Critical Point
• Magnetic-Field Dependence of the YbRh2Si2 Fermi Surface
• Metamagnetism and Lifshitz Transitions in Models for Heavy Fermions
• Hall effect in heavy-fermion metals
• Evolution of the Kondo state of YbRh2Si2 probed by high field ESR
• Huge First-Order Metamagnetic Transition in the Paramagnetic Heavy-Fermion System CeTiGe
• Magnetic Polarization and Fermi Surface Instability: Case of YbRh2Si2
• Thermoelectric transport across the metamagnetic transition of CeRu2Si2
• Field dependent quasiparticles in a strongly correlated local system II

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