Zeeman-driven Lifshitz transition: A scenario for the Fermi-surface reconstruction in YbRh2Si2

Abstract

The heavy-fermion metal YbRh2Si2 displays a field-driven quantum phase transition where signatures of a Fermi-surface reconstruction have been identified, often interpreted as breakdown of the Kondo effect. We argue that instead many properties of the material can be consistently described assuming a Zeeman-driven Lifshitz transition of narrow heavy-fermion bands. Using a suitable quasiparticle model, we find a smeared jump in the Hall constant and lines of maxima in susceptibility and specific heat, very similar to experimental data. An intermediate non-Fermi liquid regime emerges due to the small effective Fermi energy near the transition. Further experiments to discriminate the different scenarios are proposed.

4 pages, 3 figs

References in corpus (8)

• Fermi-liquid instabilities at magnetic quantum phase transitions
• Quantum Criticality in Heavy Fermion Metals
• Fractionalized Fermi liquids
• Multiple energy scales at a quantum critical point
• Fermi-surface collapse and dynamical scaling near a quantum critical point
• Divergence of the Magnetic Grüneisen Ratio at the Field-Induced Quantum Critical Point in YbRh${}_2$Si${}_2$
• Fermi surface topology of the two-dimensional Kondo lattice model: a dynamical cluster approximation approach
• Mean Field study of the heavy fermion metamagnetic transition

Cited by in corpus (1)

• Thermodynamic signatures of a fractionalized Fermi liquid