Direct observation of quasi-particle band in CeIrIn$_5$: Angle-resolved photoemission spectroscopy study

Details Direct observation of quasi-particle band in CeIrIn$_5$: Angle-resolved photoemission spectroscopy study Direct observation of quasi-particle band in CeIrIn$_5$: Angle-resolved photoemission spectroscopy study

2006-02-13

arxiv.org/abs/cond-mat/0602296v1

Phys. Rev. B 73, 224517 (2006)

Physics

Condensed Matter

Strongly Correlated Electrons

5 pages, 3 figures

Scientific paper

10.1103/PhysRevB.73.224517

We have performed a high-resolution angle resolved Ce 4$d-4f$ resonant photoemission experiment on the heavy fermion superconductor CeIrIn$_5$. We have observed a quasi-particle band which has an energy dispersion of $\sim 30$ meV in the Ce 4$f$ on-resonance spectra. The result suggests that although the 4$f$ spectra are dominated by the localized/correlated character, the small itinerant component is responsible for the superconductivity in this compound.

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