Zeeman-driven lifshitz transition: A model for the experimentally observed fermi-surface reconstruction in YbRh2Si2
Publikation: Beitrag in Fachzeitschrift › Forschungsartikel › Beigetragen › Begutachtung
Beitragende
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 a breakdown of the Kondo effect. We argue that instead many properties of the material can be consistently described by 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.
Details
Originalsprache | Englisch |
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Aufsatznummer | 137002 |
Fachzeitschrift | Physical review letters |
Jahrgang | 106 |
Ausgabenummer | 13 |
Publikationsstatus | Veröffentlicht - 29 März 2011 |
Peer-Review-Status | Ja |