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Proceedings Paper

Phonon contribution to high-Tc superconductivity: tunneling study of slightly overdoped Bi2Sr2CaCu2O8
Author(s): Nobuo Tsuda; Makoto Saitoh; Daisuke Shimada
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Paper Abstract

Reproducibility of phonon structures in the tunneling conductance is studied by using mechanical Bi2Sr2CaCu2O8/Au contacts. The structures are much weaker than a previous clear phonon structure for a BiSr2CaCu2O8/GaAs junction, and a smearing of the structures is discussed. The step-like increase in a critical temperature Tc with a number of CuO2 layer is explained as a natural consequence of the phonon mechanism in a layered lattice. For explaining an extraordinarily large relative gap, 2Δ(0)/kB Tc, and a Tc dependent isotope effect, an Eliashberg-magnetic pair break scenario is proposed for underdoped oxides.

Paper Details

Date Published: 7 November 2002
PDF: 10 pages
Proc. SPIE 4811, Superconducting and Related Oxides: Physics and Nanoengineering V, (7 November 2002); doi: 10.1117/12.452314
Show Author Affiliations
Nobuo Tsuda, Science Univ. of Tokyo (Japan)
Makoto Saitoh, Science Univ. of Tokyo (Japan)
Daisuke Shimada, Shizuoka Univ. (Japan)

Published in SPIE Proceedings Vol. 4811:
Superconducting and Related Oxides: Physics and Nanoengineering V
Ivan Bozovic; Davor Pavuna, Editor(s)

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