Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2008-01-02
Science 318, 1615-1617 (2007)
Physics
Condensed Matter
Strongly Correlated Electrons
12 pages, 3 figures
Scientific paper
10.1126/science.1149064
We address the fundamental question of crossover from localized to itinerant state of a paradigmatic heavy fermionmaterial CeIrIn5. The temperature evolution of the one electron spectra and the optical conductivity is predicted from first principles calculation. The buildup of coherence in the form of a dispersive many body feature is followed in detail and its effects on the conduction electrons and optical conductivity of the material is revealed. We find multiple hybridization gaps and link them to the crystal structure of the material. Our theoretical approach explains the multiple peak structures observed in optical experiments and the sensitivity of CeIrIn5 to substitutions of the transition metal element and may provide a microscopic basis for the more phenomenological descriptions currently used to interpret experiments in heavy fermion systems.
Haule Kristjan
Kotliar Gabriel
Shim Ji Hoon
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