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Valence Band Electronic Structure of HgMSe (M=Mn, Fe, Co)

100%
Guziewicz A., Kowalski B. J., Orłowski B. A., Ghijsen J., Johnson R.
Acta Physica Polonica A
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1994
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vol. 86
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issue 5
817-823
EN
The synchrotron radiation in the energy range between 40 and 80 eV was applied to investigate the electronic structure of Hg_{0.7}Mn_{0.3}Se, Hg_{0.88}Fe_{0.12}Se and Hg_{0.93}Co_{0.07}Se crystals by means of the resonant photoemission spectroscopy. The set of energy distribution curves was measured in the region near the M (M = Mn 3d^{5}, Fe 3d^{6}, Co 3d^{7}) 3p-3d transitions. In order to determine thoroughly the Fano type resonance energy the constant initial states curves were measured.
2
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Resonant Photoemission Spectra of Zn_{1-x}Co_{x}S Valence Band

86%
Kowalski B. J., Gołacki Z., Guziewicz A., Orłowski B. A., Mašek J., Ghijsen J., Johnson R.
Acta Physica Polonica A
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1994
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vol. 86
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issue 5
831-836
EN
We report the results of a resonant photoemission study of Zn_{1-x}Co_{x}S. A Co 3d derived contribution to the valence band spectra was revealed as a 5 eV wide structure with two maxima: at the edge of the valence band and about 4 eV below the edge. The results were compared with the total DOS distribution resulting from tight binding-coherent potential approximation calculations.
3
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Resonant Photoemission Study of Mn 3d Electrons Contribution to the Pb_{0.92}Mn_{0.08}Se Valence Band

86%
Orłowski B., Kowalski B., Le K., Gałązka R., Ghijsen J., Johnson R.
Acta Physica Polonica A
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1995
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vol. 87
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issue 2
329-332
EN
The resonant photoemission spectroscopy was applied to investigate the valence band electronic structure of semimagnetic semiconductor Pb_{0.92}Mn_{0.08}Se crystal and to determine the contribution of Mn 3d electrons to the valence band. The set of energy distribution curves and constant initial states spectra were taken for by energies in the region (40-60 eV) close to the Mn 3p-3d transition. The electrons Mn 3d hybridize and contribute to the valence band electrons of the crystal and main density of states contribution appears in the energy 3.5 ± 0.2 eV below the valence band edge.
4
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4f Contribution to Valence Band of Pb_{1-x}RE_{x}S (RE = Eu,Gd) Studied by Resonant Photoemission

86%
Kowalski B., Gołacki Z., Guziewicz E., Orłowski B., Ghijsen J., Johnson R.
Acta Physica Polonica A
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1996
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vol. 90
|
issue 5
1035-1039
EN
Resonant photoemission experiments were carried out in order to reveal the contributions of partly filled Eu 4f^{7} and Gd 4f^{7} shells to the valence bands of Pb_{0.95}Eu_{0.05}S and Pb_{0.95}Gd_{0.05}S crystals. The coupling between these orbitals and the host electronic states is discussed.
5
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Resonant Photoemission Study of Gd 4f States in IV-VI Crystals

86%
Kowalski B. J., Gołacki Z., Guziewicz E., Orłowski B. A., Ghijsen J., Johnson R. L.
Acta Physica Polonica A
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1997
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vol. 91
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issue 4
819-823
EN
Resonant photoemission experiments were performed in order to reveal the contributions of half-filled Gd 4f^{7} shell to the electronic structures of Sn_{0.95}Gd_{0.05}Te and Pb_{0.95}Gd_{0.05}S crystals. The influences of the Gd 4f^{6} final-state multiplet splitting and f-ligand hybridization on the shapes of the spectra are discussed.
6
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Influence of Yb on Valence Band Density of States of CdYbTe and PbYbTe - a Resonant Photoemission Study

59%
Szamota-Sadowska K., Kowalski B., Guziewicz E., Orłowski B., Sadowski J., Gołacki Z., Ghijsen J., Johnson R., Belkhou R., Radosavkič D., Martinotti D., Barrett N., Guillot C.
Acta Physica Polonica A
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1996
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vol. 90
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issue 5
943-946
EN
Photoemission measurements using synchrotron radiation were performed on PbYbTe (bulk crystal) and CdYbTe (MBE thin film). The resonant enhancement of the photoemission was applied for investigation of the contribution of Yb 4f electrons to the valence band. The set of the energy distribution curves was collected for energies in the region close to the 4d-4f Fano transition. The Yb 4f^{14} were observed at the binding energies close to the edge of the valence band while the 4f^{13} states were revealed deep in the valence band.
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