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22 Oct 2012

Volume 101, Issue 17, Articles (17xxxx)

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Appl. Phys. Lett. 101, 171101 (2012); http://dx.doi.org/10.1063/1.4758996 (4 pages)

Wolfram H. P. Pernice and Harish Bhaskaran
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Quantum phase slips in superconducting Nb nanowire networks deposited on self-assembled Si templates

C. Cirillo, M. Trezza, F. Chiarella, A. Vecchione, V. P. Bondarenko, S. L. Prischepa, and C. Attanasio

Appl. Phys. Lett. 101, 172601 (2012); http://dx.doi.org/10.1063/1.4764066 (5 pages)

Online Publication Date: 24 October 2012

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Robust porous silicon substrates were employed for generating interconnected networks of superconducting ultrathin Nb nanowires. Scanning electron microscopy analysis was performed to investigate the morphology of the samples, which constitute of polycrystalline single wires with grain size of about 10 nm. The samples exhibit nonzero resistance over a broad temperature range below the critical temperature, fingerprint of phase slippage processes. The transport data are satisfactory reproduced by models describing both thermal and quantum fluctuations of the superconducting order parameter in thin homogeneous superconducting wires.
Show PACS
74.40.Kb Quantum critical phenomena
74.78.Na Mesoscopic and nanoscale systems
74.10.+v Occurrence, potential candidates
73.63.Nm Quantum wires
61.43.Gt Powders, porous materials
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