Weak coupling BCS-like superconductivity in the pnictide oxide Ba1 -xNaxTi2Sb2O (x=0 and 0.15)

Melissa Gooch, Phuong Doan, Zhongjia Tang, Bernd Lorenz, Arnold M. Guloy, Paul C.W. Chu

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21 Citations (Scopus)


We report the results of low-temperature heat capacity measurements of the pnictide oxide superconductor BaTi2Sb2O doped with sodium. The temperature- and field-dependent heat capacity data are well described by a single-gap BCS theory. The estimated values for the normal-state Sommerfeld constant, the heat capacity jump at Tc, and the electron-phonon coupling constant are in favor of a conventional weak coupling superconductivity mediated by electron-phonon interaction. The results are discussed with regard to and compared with recent first-principles calculations.

Original languageEnglish
Article number064510
JournalPhysical Review B - Condensed Matter and Materials Physics
Issue number6
Publication statusPublished - 2013 Aug 23

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics


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