Superconducting nanobridges under magnetic fields
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.
Cite
@article{arxiv.cond-mat/0304560,
title = {Superconducting nanobridges under magnetic fields},
author = {J. G. Rodrigo and H. Suderow and S. Vieira},
journal= {arXiv preprint arXiv:cond-mat/0304560},
year = {2015}
}
Comments
17 pages, 7 figures