Electron-phonon coupling in Mn+1 A Xn -phase carbides

S. E. Lofland, J. D. Hettinger, T. Meehan, A. Bryan, P. Finkel, S. Gupta, M. W. Barsoum, G. Hug

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Abstract

We have investigated the electrical resistivity, magnetotransport, and heat capacity in several compounds of the type Mn+1 A Cn. The temperature dependence of the electrical resistivity and the electronic contribution to the heat capacity of this family of materials are strongly influenced by electron-phonon coupling. We have extracted two independent values for the electron-phonon coupling parameter λ from the experimental data and find consistency between the two sets. We use λ to predict the superconducting transition temperature Tc of these materials. In agreement with those predictions, Nb2 AsC has a superconducting transition near 2 K.

Original languageEnglish (US)
Article number174501
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume74
Issue number17
DOIs
StatePublished - 2006

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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