Journal
PHYSICAL REVIEW B
Volume 72, Issue 17, Pages -Publisher
AMERICAN PHYSICAL SOC
DOI: 10.1103/PhysRevB.72.174506
Keywords
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Funding
- Engineering and Physical Sciences Research Council [GR/S60471/01] Funding Source: researchfish
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We have measured the resistance vs temperature, R(T), and current vs voltage, I(V), for a series of submicrometer YBa2Cu3O7-delta tracks. We find that superconductivity is suppressed when the room temperature resistance is greater than the superconducting resistance quantum, R-q=h/4e(2). In addition, we observe regular steps in the I(V) characteristics of some bridges, which we associate with phase slip centers. For one bridge, with resistance just below the resistance quantum, R-q, we find a gradual entry into the superconducting state which is well fit by theoretical predictions for thermally activated phase slips in a superconducting wire.
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