Volume 55, Number 6, September II 2001
|Page(s)||847 - 853|
|Section||Condensed matter: electronic structure, electrical, magnetic, and optical properties|
|Published online||01 December 2003|
Out-of-plane optical conductivity in d-wave superconductors
Department of Physics, Technical University of Budapest
H-1521 Budapest, Hungary
2 Department of Physics and Astronomy, University of Southern California Los Angeles CA 90089-0484, USA
3 Research Institute for Solid State Physics and Optics P.O. Box 49, H-1525 Budapest, Hungary
Accepted: 6 July 2001
We study theoretically the out-of-plane optical conductivity of d-wave superconductors in the presence of impurities at T=0 K. Unlike the usual approach, we assume that the interlayer quasi-particle transport is due to coherent tunneling. The present model describes the T2-dependence of the out-of-plane superfluid density observed in YBCO and Tl2201 for example. In the optical conductivity there is no Drude peak in agreement with experiment, and the interlayer Josephson tunneling is also assured in this model. In the unitary limit we predict a step-like behaviour around in both the real and imaginary part of the optical conductivity.
PACS: 74.20.-z – Theories and models of superconducting states / 74.25.Fy – Transport properties (optical and thermal conductivity, thermoelectric effects, etc.) / 74.25.Gz – Optical properties
© EDP Sciences, 2001
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