Insight into the f-Derived Fermi Surface of the Heavy-Fermion Compound YbRh2Si2
Research output: Contribution to journal › Research article › Contributed › peer-review
Contributors
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 language | English |
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Article number | 267601 |
Number of pages | 5 |
Journal | Physical review letters |
Volume | 107 |
Issue number | 26 |
Publication status | Published - 22 Dec 2011 |
Peer-reviewed | Yes |
External IDs
PubMed | 22243181 |
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Scopus | 84455202045 |
Keywords
Keywords
- Ce compounds, Photoemission, Electron, Model