Journal
PHYSICAL REVIEW LETTERS
Volume 93, Issue 8, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.93.087002
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We have measured the transport properties of a series of underdoped YBa2Cu3O7-delta 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 T-c, consistent with the formation and dynamics of a domain structure. We also find anomalous hysteretic steps in the current-voltage characteristics well below T-c.
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