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.
|期刊||Physical Review B - Condensed Matter and Materials Physics|
|出版狀態||Published - 2013 8月 23|
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