X-Ray Photoelectron Spectroscopy of Various Core Levels of Lanthanide Ions: The Roles of Monopole Excitation and Electrostatic Coupling

Signorelli, A. J.; Hayes, Robert G.

doi:10.1103/physrevb.8.81

Cited by 203 publications

(68 citation statements)

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“…The value of EB(A) is found here to be shifted (from that of Yb metal) to higher binding energy, which coincides well with that of Yb2O3 [7]. On the other hand, the energy of the peak B (190.6 eV) agrees very well with that of the corresponding 4d312 peak of Yb metal [10,7] and a partially oxidized Yb [10], whereas it slightly differs from that of pure Yb2O3 (EB = 192 eV [10,11]). Despite of its complexity, the spectrum considered (Fig.…”

Section: Results and Concluding Remarkssupporting

confidence: 76%

X-Ray Photoelectron Study of Yb-Doped InP

1997

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X-ray photoelectron spectra of core levels are reported for InP:Yb. Crystalline InP, doped with Yb to a level of 0.5 at.%, was grown by the synthesized solute diffusion method. An analysis of the core-level spectra of the constituent components, i.e. In 3d512 and P 2p, revealed a minor influence of the surface oxide species, mainly in the phosphate-like form. The spectrum of the Yb 4d core level was also recorded. The energy of the Yb 4d312 peak was found identical to that in Yb metal, whereas the 4d512 peak was found to be shifted to higher binding energies. This effect was found comparable to the case of advanced oxidation of Yb thus confirming its high reactivity, even as a bulk dopant. The data give also a rare experimental example of detection of bulk dopant atoms in a semiconductor matrix by X-ray photoelectron spectroscopy at the limit of detectability.

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Section: Results and Concluding Remarkssupporting

confidence: 76%

X-Ray Photoelectron Study of Yb-Doped InP

1997

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“…In Ce 4d XPS spectra for the intermediate valence systems there are additional photoemission lines due to the 4d 9 4f 0 final states. These peaks are usually observed in a distance of ∼11 eV from the main peaks and their splitting is almost equal to the 4d spin-orbit splitting in La (∼2.9 eV) [18][19][20]. In the Ce 4d XPS spectrum of Ce 5 Rh 4 Sn 10 there is no evidence for additional sharp peaks at a binding energy of 118-124 eV, which would provide evidence of an intermediate valence behavior of Ce.…”

Section: Ce Core-level Xps Spectramentioning

confidence: 94%

Electronic structure of Ce 5Rh 4Sn 10 from XPS and band structure calculations

2008

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Abstract. We present a combined experimental and theoretical study of the electronic structure for the heavy-fermion antiferromagnet Ce5Rh4Sn10 based on X-ray photoemission spectroscopy (XPS) data and ab initio band structure calculations. The Ce core-level XPS spectra point to a stable trivalent configuration of Ce atoms in Ce5Rh4Sn10, consistently with both the magnetic susceptibility data and the results of computational structure optimization. The band structure calculations confirm a magnetic ground state with significant magnetic moments only at the Ce atoms. The qualitatively correct description of Ce 3+ in Ce5Rh4Sn10 has been achieved using the LSDA+U approach for the Ce 4f states. The comparison of the theoretical results with experimental XPS valence band spectrum supports their validity. The calculated partial densities of states suggest that there is a variation in binding energy of the occupied 4f states between Ce atoms in nonequivalent crystallographic positions, which is related to the hybridization with Sn states. Finally, the band structure and charge density maps point to the formation of zig-zag chains of the strongly bounded Sn(2), Sn(3) and Rh atoms along the tetragonal axis, whereas Sn(1) shows nearly dispersionless 5s bands.PACS. 79.60.-i Photoemission and photoelectron spectra -71.20.Lp Intermetallic compounds -71.27.+a Strongly correlated electron systems; heavy fermions

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“…Cohen,3 . et al observed and assigned multiplet structure in rare-earth trifluorides .. 4 Recently Signorelli and Hayes reported complex structure in the 4d spectra…”

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confidence: 99%