Temperature-dependent angular resolved UV-photoemission spectroscopy from CeNi2Ge2

We present a detailed investigation of the electronic band structure of the heavy Fermion compound CeNi 2 Ge 2 by means of angle resolved photoemission spectroscopy ͑ARPES͒. Measured with high angular and energy resolution, the experimental data from the ͑001͒ surface display several narrow bands close to the Fermi energy. The nature of these bands was identified by a comparison with augmented spherical wave ͑ASW͒ band structure calculations based on density functional theory ͑DFT͒ in the local density approximation ͑LDA͒. In contrast to the results of previous photoemission measurements on in situ prepared films of CeNi 2 Ge 2 we demonstrate that the investigated bands show strong dispersion, in agreement with the theoretical results. In addition we show that the orbital character of the states close to the Fermi level is mainly Ni 3d and that an ''unusual giant Kondo resonance'' does not exist in the photoemission spectra.

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Electronic structure ofCeNi2Ge2investigated by angle-resolved photoemission and density-functional calculations

Ehm

Reinert

Nicolay

et al. 2001

Phys. Rev. B

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Temperature-dependent angular resolved UV-photoemission spectroscopy from CeNi2Ge2

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Electronic structure ofCeNi2Ge2investigated by angle-resolved photoemission and density-functional calculations

Electronic structure ofCeNi2Ge2investigated by angle-resolved photoemission and density-functional calculations

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