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 |
|---|---|
| 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 |
|---|---|
| Scopus | 84455202045 |
Keywords
Keywords
- Ce compounds, Photoemission, Electron, Model