Dresden 2011 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 10: Poster Session: Superconductivity
TT 10.38: Poster
Montag, 14. März 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).