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Proceedings Paper

Interlayer tunneling mechanism: experimental test of single-layer compounds
Author(s): Artem A. Tsvetkov; Dirk van der Marel; D. Dulic; H. J. Molegraaf; Nikolai N. Kolesnikov; B. Willemsen; Z. F. Ren
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Paper Abstract

The c-axis optical properties of cuprate superconductors have been studied by grazing angle reflectivity technique. We tested the interlayer tunneling model of high temperature superconductivity and showed that the basic relation between the condensation energy of the superconducting state and the interlayer Josephson coupling does not hold for Tl2Ba2CuO6. Measuring the reflectivity at an oblique angle of incidence on the ab-surface of Tl2Ba2CuO6, we found the c-axis plasma resonance at 28 cm-1. The corresponding Josephson coupling energy is at least an order of magnitude lower than the condensation energy determined for the specific heat measurements. In the double layer compound Tl2Ba2CaCu2O8 the c-axis plasma resonance was observed at 26 cm-1. The c-axis penetration depth and the c-axis conductivity follow the Ambegaokar-Baratoff or 'dirty limit' superconductor relation if a very small energy gap is assumed.

Paper Details

Date Published: 9 December 1998
PDF: 9 pages
Proc. SPIE 3480, Superconducting Superlattices II: Native and Artificial, (9 December 1998); doi: 10.1117/12.332448
Show Author Affiliations
Artem A. Tsvetkov, Univ. of Groningen and P. N. Lebedev Physical Institute (Netherlands)
Dirk van der Marel, Univ. of Groningen (Netherlands)
D. Dulic, Univ. of Groningen (Netherlands)
H. J. Molegraaf, Univ. of Groningen (Netherlands)
Nikolai N. Kolesnikov, Institute of Solid State Physics (Russia)
B. Willemsen, Superconductor Technologies (United States)
Z. F. Ren, SUNY/Buffalo (United States)

Published in SPIE Proceedings Vol. 3480:
Superconducting Superlattices II: Native and Artificial
Ivan Bozovic; Davor Pavuna, Editor(s)

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