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Electron tunneling spectroscopy of the phonon spectrum of MgB2

  • Metals and Superconductors
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Abstract

The specific features of the phonon spectrum of the MgB2 compound (T c = 38 K) are investigated by tunneling spectroscopy. It is demonstrated that both the position and the energy width of the fundamental optical mode E 2g in the phonon spectrum are in good agreement with inelastic X-ray spectroscopy data but differ substantially from Raman spectroscopy results. Among possible factors responsible for this discrepancy, the anharmonic and nonadiabatic effects that are characteristic of the MgB2 system are discussed.

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Authors and Affiliations

  1. Donetsk Institute for Physics and Engineering, National Academy of Sciences of Ukraine, Donetsk, ul. Rozy Lyuksemburg 72, 83114, Ukraine

    V. Yu. Tarenkov, A. I. D’yachenko, S. L. Sidorov, V. A. Boĭchenko & D. I. Boĭchenko

  2. Institute of Electrical Engineering, Slovak Academy of Sciences, Bratislava, Slovak Republic

    Š. Chromik, V. Štrbík, Š. Gaži, M. Španková & Š. Beňačka

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  1. V. Yu. Tarenkov
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  2. A. I. D’yachenko
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  3. S. L. Sidorov
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  4. V. A. Boĭchenko
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Correspondence to S. L. Sidorov.

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Original Russian Text © V.Yu. Tarenkov, A.I. D’yachenko, S.L. Sidorov, V.A. Boĭchenko, D.I. Boĭchenko, Š. Chromik, V. Štrbík, Š. Gaži, M. Španková, Š. Beňačka, 2009, published in Fizika Tverdogo Tela, 2009, Vol. 51, No. 9, pp. 1678–1683.

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Tarenkov, V.Y., D’yachenko, A.I., Sidorov, S.L. et al. Electron tunneling spectroscopy of the phonon spectrum of MgB2 . Phys. Solid State 51, 1778–1784 (2009). https://doi.org/10.1134/S1063783409090030

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