Enhanced Superconductivity in Nanosized Tips of Scanning Tunnelling Microscope

• Authors: T. Samuely , P. Szabó , V. Komanický , J. Rodrigo , S. Vieira , P. Samuely
• Languages of publication: 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

EN

74.55.+v; 61.46.-w

Discipline

• 74.55.+v: Tunneling phenomena: single particle tunneling and STM
• 61.46.-w: Structure of nanoscale materials(for thermal properties of nanocrystals and nanotubes, see 65.80.-g; for mechanical properties of nanoscale systems, see 62.25.-g; for electronic transport in nanoscale materials, see 73.63.-b; see also 62.23.-c Structural classes of nanoscale systems; 64.70.Nd Structural transitions in nanoscale materials; for magnetic properties of nanostructures, see 75.75.-c)

• Journal: Acta Physica Polonica A
• Year: 2010
• Volume: 118
• Issue: 5
• Pages: 1038-1039

Dates

published

2010-11

Contributors

author

T. Samuely

• 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

P. Szabó

• 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

V. Komanický

• 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

J. Rodrigo

• Laboratorio de Bajas Temperaturas, Universidad Autónoma de Madrid, 28049 Madrid, Spain

author

S. Vieira

• Laboratorio de Bajas Temperaturas, Universidad Autónoma de Madrid, 28049 Madrid, Spain

author

P. Samuely

• 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)

Identifiers

DOI

10.12693/APhysPolA.118.1038