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Phys. Rev. Lett. 93, 087002 (2004) [4 pages]

Electronic Transport in Underdoped YBa2Cu3O7-δ Nanowires: Evidence for Fluctuating Domain Structures

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J. A. Bonetti *, D. S. Caplan, D. J. Van Harlingen, and M. B. Weissman
Department of Physics and Materials Research Laboratory, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, USA

Received 6 March 2004; published 17 August 2004

We have measured the transport properties of a series of underdoped YBa2Cu3O7-δ nanowires fabricated with widths of 100–250 nm. We observe large telegraphlike fluctuations in the resistance between the pseudogap temperature T* and the superconducting transition temperature Tc, consistent with the formation and dynamics of a domain structure. We also find anomalous hysteretic steps in the current-voltage characteristics well below Tc.


©2004 The American Physical Society

URL: http://link.aps.org/doi/10.1103/PhysRevLett.93.087002
DOI: 10.1103/PhysRevLett.93.087002
PACS: 74.78.Na, 74.25.Fy, 74.72.Bk

* Present address: Department of Physics, California Institute of Technology, Pasadena, CA 91125

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