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−xInxTe where 0≤x≤8.4, along with microstructural analysis based on transmission electron microscopy. For small indium concentrations, x≤0.9 the material does not superconduct above 0.3 K, and the transport properties are consistent with simple metallic behavior. For x≥2.7 the material exhibits anomalous low temperature scattering and for x≥6.1 bulk superconductivity is observed with critical temperatures close to 2 K. Intermediate indium concentrations 2.7 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.
@article{arxiv.1009.0090,
title = {Anomalous scattering in superconducting indium-doped tin telluride},
author = {A. S. Erickson and T. H. Geballe and I. R. Fisher and Y. Q. Wu and M. J. Kramer},
journal= {arXiv preprint arXiv:1009.0090},
year = {2010}
}