| Issue |
Europhys. Lett.
Volume 55, Number 6, September II 2001
|
|
|---|---|---|
| Page(s) | 847 - 853 | |
| Section | Condensed matter: electronic structure, electrical, magnetic, and optical properties | |
| DOI | https://doi.org/10.1209/epl/i2001-00358-9 | |
| Published online | 01 December 2003 | |
Out-of-plane optical conductivity in d-wave superconductors
1
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
Received:
5
February
2001
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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