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Superconducting nanobridges under magnetic fields | | J.G. Rodrigo
; H. Suderow
; S. Vieira
; | | Date: |
24 Apr 2003 | | Journal: | phys. stat. sol. (b) 237, No.1, 386-393 (2003) | | Subject: | Superconductivity; Mesoscopic Systems and Quantum Hall Effect | cond-mat.supr-con cond-mat.mes-hall | | Abstract: | We report on the study of superconducting nanotips and nanobridges of lead with a Scanning Tunnelling Microscope in tunnel and point contact regimes. We deal with three different structures. A nanotip that remains superconducting under a field of 2 T. For this case we present model calculations of the order parameter, which are in good agreement with the experiments. An asymmetric nanobridge of lead showing a two steps loss of the Andreev excess current due to different heating and dissipation phenomena in each side of the structure. A study of the effect of the thermal fluctuations on the Josephson coupling between the two sides of a superconducting nanobridge submitted to magnetic fields. The different experiments were made under magnetic fields up to twenty five times the volume critical field of lead, and in a temperature range between 0.6 K and 7.2 K. | | Source: | arXiv, cond-mat/0304560 | | Services: | Forum | Review | PDF | Favorites | |
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