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Anomalous Scattering in Superconducting Indium-Doped Tin Telluride
Condensed Matter (2010)
  • A. S. Erickson, Stanford University
  • T. H. Geballe, Stanford University
  • I. R. Fisher, Stanford University
  • Y. Q. Wu, Iowa State University
  • M. J. Kramer, Iowa State University
Results of resistivity, Hall effect, magnetoresistance, susceptibility and heat capacity measurements are presented for single crystals of indium-doped tin telluride with compositions Sn$_{.988-x}$In$_x$Te where $0 \leq x \leq 8.4 %$, along with microstructural analysis based on transmission electron microscopy. For small indium concentrations, $x \leq 0.9 %$ the material does not superconduct above 0.3 K, and the transport properties are consistent with simple metallic behavior. For $x \geq 2.7 %$ the material exhibits anomalous low temperature scattering and for $x \geq 6.1 %$ bulk superconductivity is observed with critical temperatures close to 2 K. Intermediate indium concentrations $2.7% \leq x \leq 3.8%$ do not exhibit bulk superconductivity above 0.7 K. Susceptibility data indicate the absence of magnetic impurities, while magnetoresistance data are inconsistent with localization effects, leading to the conclusion that indium-doped SnTe is a candidate charge Kondo system, similar to thallium-doped PbTe.
Publication Date
September 1, 2010
Citation Information
A. S. Erickson, T. H. Geballe, I. R. Fisher, Y. Q. Wu, et al.. "Anomalous Scattering in Superconducting Indium-Doped Tin Telluride" Condensed Matter (2010)
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