Fenton, JC;
Korsah, M;
Grovenor, CRM;
Warburton, PA;
(2006)
Critical-current suppression in sub-micron intrinsic Josephson junction arrays.
In: Weber, HW and Sauerzopf, FM, (eds.)
Journal of Physics: Conference Series.
(pp. 1114 - 1118).
IOP Publishing Ltd: Bristol, UK.
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Abstract
We present experimental results on intrinsic Josephson junctions fabricated by three-dimensional gallium focussed-ion-beam (FIB) milling in c-axis-oriented Tl2Ba2CaCu2O8 thin films. We report measurements of the dependence of the switching current density of these arrays at 4.2 K upon the junction cross-sectional area A showing strong suppression of the switching current density for junctions with A less than or similar to 1 mu m(2); the switching current extrapolates to zero for A similar to 0.25 mu m(2). We discuss the roles of gallium ion implantation and both thermal and quantum fluctuations in this current suppression. We also present in-situ IV measurements demonstrating the use of a liquid-helium-cooled sample stage in conjunction with the FIB milling.
| Type: | Proceedings paper |
|---|---|
| Title: | Critical-current suppression in sub-micron intrinsic Josephson junction arrays |
| Event: | 7th European Conference on Applied Superconductivity (EUCAS'05) |
| Location: | Vienna Univ Technol, Vienna, Austria |
| Dates: | 2005-09-11 - 2005-09-15 |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1088/1742-6596/43/1/271 |
| Publisher version: | http://dx.doi.org/10.1088/1742-6596/43/1/271 |
| Language: | English |
| Additional information: | This work is licensed under a Creative Commons Attribution 3.0 Unported License (http://creativecommons.org/licenses/by/3.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. |
| Keywords: | Fabrication |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > London Centre for Nanotechnology |
| URI: | https://discovery.ucl.ac.uk/id/eprint/152804 |
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