Valency of Yb in PbS and PbTe Determined by XPS

• Authors: Z. Gołacki , M. Heinonen
• Languages of publication: EN

Abstracts

EN

X-ray photoelectron spectroscopy experiments on PbTe:Yb, PbS:Yb, PbTe, and PbS crystals have been performed using the monochromatized Al K_{α} radiation. The valence band spectrum of PbTe:Yb exhibits one set of peaks associated with divalent Yb initial states, but two sets associated with divalent and trivalent Yb are observed for PbS:Yb. The valency of Yb in PbTe:Yb is 2 (within an accuracy of the experiment) but in PbS:Yb the mixed valency of Yb is seen. These conclusions are confirmed by an analysis of Yb 4d spectra in PbTe:Yb and PbS:Yb crystals.

Keywords

EN

71.20.Nr; 79.60.-i

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 1997
• Volume: 91
• Issue: 4
• Pages: 775-778

Dates

published

1997-04

Contributors

author

Z. Gołacki

• Institute of Physics, Polish Academy of Sciences, Al. Lotników 32/46, 02-668 Warsaw, Poland

author

M. Heinonen

• Department of Applied Physics, University of Turku, ElectroCity, Tykistokatu 2D, 20520 Turku, Finland