Clean and ordered surfaces of CeNi 2 Ge 2 layers on W(110)

Schmied, B.; Wilhelm, Manfred; Kübler, U.; Getzlaff, M.; Fecher, Gerhard H.; Schönhense, G.

doi:10.1007/s002160050365

Cited by 2 publications

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“…Although in situ cleaved single crystals are known to yield well ordered and contamination free surfaces, there are only a few ARPES experiments on singlecrystalline Ce compounds in the literature, 15,16 mainly because of the restricted availability of such crystals and problems in the in situ cleavage procedure. In the particular case of CeNi 2 Ge 2 , the only published ARPES measurements [17][18][19][20][21][22] have been performed on in situ prepared, epitaxially grown films in different orientations.…”

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confidence: 99%

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

et al. 2001

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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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