Correlation of anomalous normal state properties with superconductivity in Pb1-x-y Tlx Iny Te

A. S. Erickson; N. P. Breznay; E. A. Nowadnick; T. H. Geballe; I. R. Fisher

doi:10.1103/PhysRevB.81.134521

Correlation of anomalous normal state properties with superconductivity in Pb_1-x-y Tl_x In_y Te

A. S. Erickson, N. P. Breznay, E. A. Nowadnick, T. H. Geballe, I. R. Fisher

Research output: Contribution to journal › Article › peer-review

13 Scopus citations

Abstract

Recent evidence for a charge-Kondo effect in superconducting samples of Pb_1-x Tl_x Te has brought renewed attention to the possibility of negative U superconductivity in this material, associated with valence fluctuations on the Tl impurity sites. Here, we use indium as an electron donor to counterdope Pb_.99 Tl_.01 Te and study the effect of changing the chemical potential on the Kondo-type physics and the superconductivity. We find a clear correlation between these two effects, providing further evidence that both are induced by the same source, as anticipated in the charge-Kondo model.

Original language	English (US)
Article number	134521
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	81
Issue number	13
DOIs	https://doi.org/10.1103/PhysRevB.81.134521
State	Published - Apr 23 2010
Externally published	Yes

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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10.1103/PhysRevB.81.134521

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abstract = "Recent evidence for a charge-Kondo effect in superconducting samples of Pb1-x Tlx Te has brought renewed attention to the possibility of negative U superconductivity in this material, associated with valence fluctuations on the Tl impurity sites. Here, we use indium as an electron donor to counterdope Pb.99 Tl.01 Te and study the effect of changing the chemical potential on the Kondo-type physics and the superconductivity. We find a clear correlation between these two effects, providing further evidence that both are induced by the same source, as anticipated in the charge-Kondo model.",

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T1 - Correlation of anomalous normal state properties with superconductivity in Pb1-x-y Tlx Iny Te

AU - Erickson, A. S.

AU - Breznay, N. P.

AU - Nowadnick, E. A.

AU - Geballe, T. H.

AU - Fisher, I. R.

PY - 2010/4/23

Y1 - 2010/4/23

N2 - Recent evidence for a charge-Kondo effect in superconducting samples of Pb1-x Tlx Te has brought renewed attention to the possibility of negative U superconductivity in this material, associated with valence fluctuations on the Tl impurity sites. Here, we use indium as an electron donor to counterdope Pb.99 Tl.01 Te and study the effect of changing the chemical potential on the Kondo-type physics and the superconductivity. We find a clear correlation between these two effects, providing further evidence that both are induced by the same source, as anticipated in the charge-Kondo model.

AB - Recent evidence for a charge-Kondo effect in superconducting samples of Pb1-x Tlx Te has brought renewed attention to the possibility of negative U superconductivity in this material, associated with valence fluctuations on the Tl impurity sites. Here, we use indium as an electron donor to counterdope Pb.99 Tl.01 Te and study the effect of changing the chemical potential on the Kondo-type physics and the superconductivity. We find a clear correlation between these two effects, providing further evidence that both are induced by the same source, as anticipated in the charge-Kondo model.

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Correlation of anomalous normal state properties with superconductivity in Pb_1-x-y Tl_x In_y Te

Abstract

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