Dresden 2011 – scientific programme

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TT: Fachverband Tiefe Temperaturen

TT 10: Poster Session: Superconductivity

TT 10.38: Poster

Monday, March 14, 2011, 14:00–18:00, P4

Optical conductivity of Pr₂CuO₄ in the terahertz range — •T. Fischer¹, A. V. Pronin¹, J. Wosnitza¹, A. Ikeda², and M. Naito² — ¹Hochfeld-Magnetlabor Dresden (HLD), FZ Dresden-Rossendorf, 01314 Dresden, Germany — ²Tokyo University of Agriculture and Technology, Tokyo, Japan

Recently, it has been shown that nominally undoped Pr₂CuO₄ can become superconducting, being grown in form of thin films with T′ structure [1]. We have measured the temperature and frequency-dependent complex transmission coefficient of these films at terahertz frequencies. From the measured spectra, we have directly calculated the complex optical conductivity. Both components of the conductivity demonstrate a behavior typical for the HTS cuprates. The stiffness of the superconducting condensate is, however, quite low, leading to a large value of the London penetration depth (1.8 µ m). We discuss our results in comparison with literature data on terahertz properties of other HTS.
O. Matsumoto, A. Utsuki, A. Tsukada, H. Yamamoto, T. Manabe, and M. Naito, Phys. Rev. B 79, 100508 (2009).