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 http://resolver.caltech.edu/CaltechAUTHORS:20110426-111939363
- Published Version
See Usage Policy.
Use this Persistent URL to link to this item: http://resolver.caltech.edu/CaltechAUTHORS:20110426-111939363
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.
|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|
|Classification Code:||PACS: 74.20.Mn, 74.72.-h, 75.30.Mb, 75.40.-s|
|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.|
|Deposited By:||Ruth Sustaita|
|Deposited On:||26 Apr 2011 21:25|
|Last Modified:||26 Dec 2012 13:11|
Repository Staff Only: item control page