Thermal transport properties of U2Ru2Sn at low temperatures

A. Sanchez, S. Paschen, J. Wosnitza, J. A. Mydosh, A. M. Strydom, P. De V. Du Plessis, F. Steglich

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)


U2Ru2Sn has been classified as the first tetragonal U-based Kondo insulator. Here, we present measurements of the thermal conductivity κ and thermopower S of high-quality single-crystalline U2Ru2Sn along and perpendicular to the tetragonal c-axis, in the temperature range between 100 mK and 1 K, in zero field and in a magnetic field of 6 T. Below 400 mK, the phonon contribution to κ(T) shows a T2 behaviour for both directions that can be attributed to phonons scattered by electrons. S(T) presents a linear behaviour in the whole temperature range. S is positive along the c-axis and negative perpendicular to the c-axis. Using a one-band model the effective mass m* is estimated to be 2m0 along and 16m0 perpendicular to the c-axis, where m0 is the free-electron mass. This indicates that U2Ru2Sn has a highly anisotropic residual density of states within the pseudogap.

Original languageEnglish
Pages (from-to)1015-1017
Number of pages3
JournalPhysica B: Condensed Matter
Issue numberSPEC. ISS.
Publication statusPublished - 30 Apr 2005


  • Kondo insulator
  • Thermal transport
  • URuSn

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering


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