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Zeeman-Driven Lifshitz Transition: A Model for the Experimentally Observed Fermi-Surface Reconstruction in YbRh_2Si_2

Hackl, Andreas and Vojta, Matthias (2011) Zeeman-Driven Lifshitz Transition: A Model for the Experimentally Observed Fermi-Surface Reconstruction in YbRh_2Si_2. Physical Review Letters, 106 (13). Art. No. 137002. ISSN 0031-9007. https://resolver.caltech.edu/CaltechAUTHORS:20110426-111939363

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Abstract

The heavy-fermion metal YbRh_2Si_2 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.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1103/PhysRevLett.106.137002DOIUNSPECIFIED
http://link.aps.org/doi/10.1103/PhysRevLett.106.137002PublisherUNSPECIFIED
http://prl.aps.org/abstract/PRL/v106/i13/e137002PublisherUNSPECIFIED
Additional Information:© 2011 American Physical Society. Received 10 December 2010; published 29 March 2011. We enjoyed extensive exchange with M. Brando, P. Gegenwart, and O. Stockert, who suggested the relevance of Zeeman physics in YbRh_2Si_2. We further thank S. Friedemann, A. Rosch, F. Steglich, and P. Wölfle for discussions. This research was supported by DFG FOR 960
Funders:
Funding AgencyGrant Number
Deutsche Forschungsgemeinschaft (DFG)FOR 960
Issue or Number:13
Classification Code:PACS: 74.20.Mn, 74.72.-h, 75.30.Mb, 75.40.-s
Record Number:CaltechAUTHORS:20110426-111939363
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20110426-111939363
Official Citation:Zeeman-Driven Lifshitz Transition: A Model for the Experimentally Observed Fermi-Surface Reconstruction in YbRh2Si2 Andreas Hackl and Matthias Vojta Published 29 March 2011 (4 pages) 137002
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:23469
Collection:CaltechAUTHORS
Deposited By: Ruth Sustaita
Deposited On:26 Apr 2011 21:25
Last Modified:03 Oct 2019 02:46

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