Optical measurements of the superconducting gap in MgB2

B. Gorshunov, C. A. Kuntscher, P. Haas, M. Dressel, F. P. Mena, A. B. Kuz'menko, D. Van Der Marel, T. Muranaka, J. Akimitsu

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38 Citations (Scopus)

Abstract

Far-infrared reflectivity studies on the polycrystalline intermetallic compound MgB2 with a superconducting transition temperature Tc = 39 K were performed at temperatures 20 K to 300 K. We observe a significant raise of the superconductmg-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.

Original languageEnglish
Pages (from-to)159-161
Number of pages3
JournalEuropean Physical Journal B
Volume21
Issue number2
DOIs
Publication statusPublished - May 2 2001
Externally publishedYes

Keywords

  • 74.25.Gz Optical properties
  • 74.70.Ad Metals; alloys and binary compounds (including A15, Laves phases, etc.)

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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  • Cite this

    Gorshunov, B., Kuntscher, C. A., Haas, P., Dressel, M., Mena, F. P., Kuz'menko, A. B., Van Der Marel, D., Muranaka, T., & Akimitsu, J. (2001). Optical measurements of the superconducting gap in MgB2. European Physical Journal B, 21(2), 159-161. https://doi.org/10.1007/s100510170191