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Optical measurements of the superconducting gap in MgB 2

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Abstract:

Far-infrared reflectivity studies on the polycrystalline intermetallic compound MgB2 with a superconducting transition temperature T c = 39 K were performed at temperatures 20 K to 300 K. We observe a significant raise of the superconducting-to-normal state reflectivity ratio below 70 cm -1, with a maximum at about 25-30 cm -1, which gives a lower estimate of the superconducting gap of 2Δ(0) ≈ 3-4 meV.

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Authors and Affiliations

  1. 1. Physikalisches Institut, Universität Stuttgart, Pfaffenwaldring 57, 70550, Stuttgart, Germany

    B. Gorshunov, C.A. Kuntscher, P. Haas & M. Dressel

  2. Laboratory of Solid State Physics, Materials Science Centre, Nijenborgh 4, 9747AG, Groningen, The Netherlands

    F.P. Mena, A.B. Kuz'menko & D. van der Marel

  3. Department of Physics, Aoyama-Gakuin University, 6-16-1 Chitsedai, Setagaya-ku, Tokyo 157, Japan

    T. Muranaka & J. Akimitsu

Authors
  1. B. Gorshunov
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  2. C.A. Kuntscher
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  3. P. Haas
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  4. M. Dressel
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  5. F.P. Mena
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  6. A.B. Kuz'menko
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  7. D. van der Marel
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  8. T. Muranaka
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  9. J. Akimitsu
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Additional information

Received 7 March 2001 and Received in final form 18 April 2001

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Gorshunov, B., Kuntscher, C., Haas, P. et al. Optical measurements of the superconducting gap in MgB 2 . Eur. Phys. J. B 21, 159–161 (2001). https://doi.org/10.1007/s100510170191

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  • DOI: https://doi.org/10.1007/s100510170191

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