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Switching currents limited by single phase slips in one-dimensional superconducting Al nanowires.

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Date
2011-09-21
Authors
Li, Peng
Wu, Phillip M
Bomze, Yuriy
Borzenets, Ivan V
Finkelstein, Gleb
Chang, AM
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Abstract
An aluminum nanowire switches from superconducting to normal as the current is increased in an upsweep. The switching current (I(s)) averaged over upsweeps approximately follows the depairing critical current (I(c)) but falls below it. Fluctuations in I(s) exhibit three distinct regions of behaviors and are nonmonotonic in temperature: saturation well below the critical temperature T(c), an increase as T(2/3) at intermediate temperatures, and a rapid decrease close to T(c). Heat dissipation analysis indicates that a single phase slip is able to trigger switching at low and intermediate temperatures, whereby the T(2/3) dependence arises from the thermal activation of a phase slip, while saturation at low temperatures provides striking evidence that the phase slips by macroscopic quantum tunneling.
Type
Journal article
Subject
Science & Technology
Physical Sciences
Physics, Multidisciplinary
Physics
ZERO-VOLTAGE STATE
RESISTIVE TRANSITION
QUANTUM
WIRES
JUNCTIONS
Permalink
https://hdl.handle.net/10161/19626
Published Version (Please cite this version)
10.1103/physrevlett.107.137004
Publication Info
Li, Peng; Wu, Phillip M; Bomze, Yuriy; Borzenets, Ivan V; Finkelstein, Gleb; & Chang, AM (2011). Switching currents limited by single phase slips in one-dimensional superconducting Al nanowires. Physical review letters, 107(13). pp. 137004. 10.1103/physrevlett.107.137004. Retrieved from https://hdl.handle.net/10161/19626.
This is constructed from limited available data and may be imprecise. To cite this article, please review & use the official citation provided by the journal.
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Scholars@Duke

Chang

Albert M. Chang

Professor of Physics
Finkelstein

Gleb Finkelstein

Professor of Physics
Gleb Finkelstein is an experimental physicist interested in inorganic and biologically inspired nanostructures: carbon nanotubes, graphene, and self-assembled DNA 'origami'. These objects reveal a variety of interesting electronic properties that may form a basis for future detectors and sensors, or serve as individual devices in quantum information processing.
Alphabetical list of authors with Scholars@Duke profiles.
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