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2010 | 118 | 5 | 1038-1039
Article title

Enhanced Superconductivity in Nanosized Tips of Scanning Tunnelling Microscope

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EN
Abstracts
EN
Nanosized Pb junctions exhibit superconducting correlations at magnetic fields more than an order of magnitude higher than the zero-temperature critical field of the bulk Pb. The strongly enhanced critical field is a spectacular demonstration of nanosize effect where the Meissner screening currents become ineffective for junction's tip smaller than the London penetration depth (32 nm for Pb). From the enhanced critical field we characterize the geometry of a particular junction using the variable radius pair breaking theoretical model of Suderow et al.
Keywords
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Contributors
author
  • Centre of Low Temperature Physics Košice at the Institute of Experimental Physics SAS & Faculty of Sciences of the P.J. Šafárik University, 040 01 Košice, Slovakia
author
  • Centre of Low Temperature Physics Košice at the Institute of Experimental Physics SAS & Faculty of Sciences of the P.J. Šafárik University, 040 01 Košice, Slovakia
author
  • Centre of Low Temperature Physics Košice at the Institute of Experimental Physics SAS & Faculty of Sciences of the P.J. Šafárik University, 040 01 Košice, Slovakia
author
  • Laboratorio de Bajas Temperaturas, Universidad Autónoma de Madrid, 28049 Madrid, Spain
author
  • Laboratorio de Bajas Temperaturas, Universidad Autónoma de Madrid, 28049 Madrid, Spain
author
  • Centre of Low Temperature Physics Košice at the Institute of Experimental Physics SAS & Faculty of Sciences of the P.J. Šafárik University, 040 01 Košice, Slovakia
References
  • 1. R. Wiesendanger, Scanning Probe Microscopy and Spectroscopy, Cambridge University Press, Cambridge 1994
  • 2. S.H. Pan, E.W. Hudson, J.C. Davis, Rev. Sci. Instrum. 70, 1459 (1999)
  • 3. N. Agraît, A.L. Yeyati, J.M. van Ruitenbeek, Phys. Rep. 377, 81 (2003)
  • 4. J.K. Gimzewski, R. Möller, Phys. Rev. B 36, 1284 (1987)
  • 5. J.G. Rodrigo, H. Suderow, S. Vieira, Eur. Phys. J. B 40, 483 (2004)
  • 6. H. Suderow, E. Bascones, W. Belzig, F. Guinea, S. Vieira, Europhys. Lett. 50, 749 (2000)
Document Type
Publication order reference
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YADDA identifier
bwmeta1.element.bwnjournal-article-appv118n5133kz
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