2001/04/17 by A. V. Pronin, А. В. Пронин, A. Pimenov +2 · 2 citations
Materials Science · Physics and Astronomy · #Iron-based superconductors research #Physics of Superconductivity and Magnetism #Superconductivity in MgB2 and Alloys #cond-mat.mtrl-sci #cond-mat.supr-con
paper · pdf · doi:10.1103/physrevlett.87.097003
published as Phys. Rev. Lett. 87, 097003 (2001). · 4 pages, 4 figures
arxiv created 2001/04/17 · openalex publication_date 2001/08/14 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
The complex conductivity of a MgB2 film has been investigated in the frequency range 4<\ensuremathν<30cm^\ensuremath-1 and for temperatures 2.7<T<300K. The overall temperature dependence of both components of the complex conductivity is reminiscent of BCS-type behavior, although a detailed analysis reveals a number of discrepancies. A peak in the temperature dependence of the real part of the conductivity is detected for frequencies below 9cm^\ensuremath-1. The superconducting penetration depth follows a T2 behavior at low temperatures.