The charge state of Tl impurities in PbTe

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, , Citation S D Waddington et al 1988 J. Phys. C: Solid State Phys. 21 2695 DOI 10.1088/0022-3719/21/14/010

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1 Dept. of Phys., Liverpool Univ., UK

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0022-3719/21/14/2695

Abstract

X-ray photo-electron spectroscopy of Tl core lines show that Tl impurities in PbTe exist in only one charge state. This contradicts theoretical ideas that link the superconductivity of Tl-doped PbTe with the existence of Tl+ and Tl3+ sites.

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