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

Publikation: Beitrag in FachzeitschriftForschungsartikelBeigetragenBegutachtung

Beitragende

  • S. Danzenbaecher - , Professur für Oberflächenphysik (Autor:in)
  • D. V. Vyalikh - , Professur für Oberflächenphysik (Autor:in)
  • K. Kummer - , Technische Universität Dresden, European Synchrotron Radiat Facil, European Synchrotron Radiation Facility (ESRF) (Autor:in)
  • C. Krellner - , Max Planck Gesellschaft, Forschungsgruppe "Soziale Neurowissenschaften" (Autor:in)
  • M. Holder - , Technische Universität Dresden (Autor:in)
  • M. Hoeppner - , Professur für Optoelektronik (Autor:in)
  • Yu Kucherenko - , Technische Universität Dresden, National Academy of Sciences of Ukraine (Autor:in)
  • C. Geibel - , Max Planck Gesellschaft, Forschungsgruppe "Soziale Neurowissenschaften" (Autor:in)
  • M. Shi - , Paul Scherrer Institute (Autor:in)
  • L. Patthey - , ETH Zurich (Autor:in)
  • S. L. Molodtsov - , European XFEL (Autor:in)
  • C. Laubschat - , Professur für Oberflächenphysik (Autor:in)

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

OriginalspracheEnglisch
Aufsatznummer267601
Seitenumfang5
FachzeitschriftPhysical review letters
Jahrgang107
Ausgabenummer26
PublikationsstatusVeröffentlicht - 22 Dez. 2011
Peer-Review-StatusJa

Externe IDs

PubMed 22243181
Scopus 84455202045

Schlagworte

Schlagwörter

  • Ce compounds, Photoemission, Electron, Model