Hybridization effects in CeCoIn5 observed by angle-resolved photoemission
Research output: Contribution to journal › Research article › Contributed › peer-review
Contributors
Abstract
We have investigated the low-energy electronic structure of the heavy fermion superconductor CeCoIn5 by angle-resolved photoemission. We focus on the dispersion and the peak width of the prominent quasi-two-dimensional Fermi surface sheet at the corner of the Brillouin zone as a function of temperature along certain k directions with a photon energy of h nu=100 eV. We find slight changes of the Fermi vector and an anomalous broadening of the peak width when the Fermi energy is approached. Additionally, we performed resonant angle-resolved photoemission spectroscopy experiments with h nu=121 eV. A flat f-derived band is observed with a distinct temperature dependence and a k-dependent spectral weight. These results, including both off- and on-resonant measurements, fit qualitatively to a two-level mixing model derived from the periodic Anderson model.
Details
Original language | English |
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Article number | 155128 |
Number of pages | 7 |
Journal | Physical Review B |
Volume | 77 |
Issue number | 15 |
Publication status | Published - Apr 2008 |
Peer-reviewed | Yes |
Externally published | Yes |
External IDs
Scopus | 42649095154 |
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ORCID | /0000-0002-2438-0672/work/142253070 |
Keywords
Keywords
- ELECTRONIC-STRUCTURE, BAND-STRUCTURE, STATES, SUPERCONDUCTIVITY, LATTICE