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Proceedings Paper

Nanoscale studies of cuprate superconductors in the current-carrying state
Author(s): J. Y. T. Wei; J. Ngai; P. Morales
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Paper Abstract

We present a new class of nanoscale experiments on cuprate superconductors in the current-carrying state. These experiments are aimed at studying how the high-Tc order parameter responds, in both real and reciprocal space, when driven by a sizable phase gradient. First, scanning tunneling spectroscopy was performed on current-carrying YBa2Cu3O6+x (YBCO) thin-film strips, to reveal a remarkable suppression of the low-energy Andreev states indicating an increase in the local phase fluctuations. Second, transport measurements were made on optimally-doped YBCO nanostructures, to show anomalous current-voltage nonlinearities consistent with the formation of current-driven phase slip lines. These results are discussed in the general context of non-rigidity of the high-Tc order parameter under electrodynamic perturbation.

Paper Details

Date Published: 30 August 2005
PDF: 13 pages
Proc. SPIE 5932, Strongly Correlated Electron Materials: Physics and Nanoengineering, 593210 (30 August 2005); doi: 10.1117/12.631743
Show Author Affiliations
J. Y. T. Wei, Univ. of Toronto (Canada)
J. Ngai, Univ. of Toronto (Canada)
P. Morales, Univ. of Toronto (Canada)

Published in SPIE Proceedings Vol. 5932:
Strongly Correlated Electron Materials: Physics and Nanoengineering
Ivan Bozovic; Davor Pavuna, Editor(s)

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