Micro-SQUID characteristics
| dc.creator | Hasselbach, K. | |
| dc.creator | Mailly, D. | |
| dc.creator | Kirtley, J. R. | |
| dc.date | 2001-10-24 | |
| dc.date.accessioned | 2026-07-25T22:02:23Z | |
| dc.description | We report on the dependence on field and temperature of the critical current of micro-SQUIDs: SQUIDs with diameters as small as 1 micron, using Dayem bridges as weak links. We model these SQUIDs by solving the Ginzburg-Landau equations with appropriate boundary conditions to obtain the supercurrent-phase relationships. These solutions show that the phase drops and depression of the order parameter produced by supercurrent flow are often distributed throughout the micro-SQUID structure, rather than being localized in the bridge area, for typical micro-SQUID geometries and coherence lengths. The resultant highly non-sinusoidal current-phase relationships $I_c(ϕ)$ lead to reduced modulation depths and triangular dependences of the micro-SQUID critical currents on applied magnetic flux $I_c(Φ)$. Our modelling agrees well with our measurements on both Al and Nb micro-SQUIDs. | |
| dc.description | 7 pages 8 figures | |
| dc.identifier | https://arxiv.org/abs/cond-mat/0110517 | |
| dc.identifier | http://arxiv.org/abs/cond-mat/0110517 | |
| dc.identifier.uri | https://dspace.dare.co.zw/handle/123456789/85226 | |
| dc.subject | Superconductivity | |
| dc.subject | Mesoscale and Nanoscale Physics | |
| dc.title | Micro-SQUID characteristics | |
| dc.type | text |