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Electronic Structure of Sr(Pt;Pd)2Ge2 Superconductors by Ab Initio Calculations

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Abstract

Electronic structures of SrPt 2Ge 2 and SrPd 2Ge 2 superconductors have been calculated with the use of the full-potential local-orbital method within the density functional theory. The investigations were focused on analyses of differences between electronic properties of both studied intermetallics that could explain the enhancement of superconducting properties in the former one. The results indicate that the band structures in the vicinity of the Fermi level for both considered compounds are indistinguishable. Meanwhile, the calculated value of the density of states at the Fermi level for SrPt 2Ge 2 is lower than that of SrPd 2Ge 2, thus the significantly higher value of T c in the Pt-based system should be related to an anomalous enhancement of electron-phonon coupling.

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Acknowledgments

The author acknowledges M. Samsel-Czekała for valuable discussions. The calculations were performed in Wroclaw Centre for Networking and Supercomputing (Project No. 158).

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Authors and Affiliations

  1. Institute of Low Temperature and Structure Research, Polish Academy of Sciences, Okólna 2, 50-422, Wrocław, Poland

    M. J. Winiarski

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  1. M. J. Winiarski
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Correspondence to M. J. Winiarski.

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Winiarski, M.J. Electronic Structure of Sr(Pt;Pd)2Ge2 Superconductors by Ab Initio Calculations. J Supercond Nov Magn 29, 29–32 (2016). https://doi.org/10.1007/s10948-015-3239-7

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  • DOI: https://doi.org/10.1007/s10948-015-3239-7

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