Insight into the f-Derived Fermi Surface of the Heavy-Fermion Compound YbRh2Si2

Research output: Contribution to journalResearch articleContributedpeer-review

Contributors

  • S. Danzenbaecher - , Chair of Surface Physics (Author)
  • D. V. Vyalikh - , Chair of Surface Physics (Author)
  • K. Kummer - , TUD Dresden University of Technology, European Synchrotron Radiat Facil, European Synchrotron Radiation Facility (ESRF) (Author)
  • C. Krellner - , Max Planck Society, Social Neurosci Lab (Author)
  • M. Holder - , TUD Dresden University of Technology (Author)
  • M. Hoeppner - , Chair of Opto-Electronics (Author)
  • Yu Kucherenko - , TUD Dresden University of Technology, National Academy of Sciences of Ukraine (Author)
  • C. Geibel - , Max Planck Society, Social Neurosci Lab (Author)
  • M. Shi - , Paul Scherrer Institute (Author)
  • L. Patthey - , ETH Zurich (Author)
  • S. L. Molodtsov - , European XFEL (Author)
  • C. Laubschat - , Chair of Surface Physics (Author)

Abstract

Angle-resolved photoelectron spectroscopy (ARPES) was used to study the Fermi surface of the heavy-fermion system YbRh2Si2 at a temperature of about 10 K, i.e., a factor of 2 below the Kondo energy scale. We observed sharp structures with a well-defined topology, which were analyzed by comparing with results of band-structure calculations based on the local-density approximation (LDA). The observed bulk Fermi surface presents strong similarities with that expected for a trivalent Yb state, but is slightly larger, has a strong Yb-4f character, and deviates from the LDA results by a larger region without states around the (Gamma) over bar point. These properties are qualitatively explained in the framework of a simple f-d hybridization model. Our analysis highlights the importance of taking into account surface states and doing an appropriate projection along k(z) when comparing ARPES data with results from theoretical calculations.

Details

Original languageEnglish
Article number267601
Number of pages5
JournalPhysical review letters
Volume107
Issue number26
Publication statusPublished - 22 Dec 2011
Peer-reviewedYes

External IDs

PubMed 22243181
Scopus 84455202045

Keywords

Keywords

  • Ce compounds, Photoemission, Electron, Model