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

Research output: Contribution to journalArticlepeer-review

40 Citations (Scopus)


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
Issue number2
Publication statusPublished - May 2 2001
Externally publishedYes


  • 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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