Suri, Dhavala and Kamra, Akashdeep and Meier, Thomas N. G. and Kronseder, Matthias and Belzig, Wolfgang and Back, Christian H. and Strunk, Christoph (2022) Non-reciprocity of vortex-limited critical current in conventional superconducting micro-bridges. APPLIED PHYSICS LETTERS, 121 (10): 102601. ISSN 0003-6951, 1077-3118
Full text not available from this repository. (Request a copy)Abstract
Non-reciprocity in the critical current has been observed in a variety of superconducting systems and has been called the superconducting diode effect. The origin underlying the effect depends on the symmetry breaking mechanisms at play. We investigate superconducting micro-bridges of NbN and also NbN/magnetic insulator (MI) hybrids. We observe a large diode efficiency of approximate to 30% when an out-of-plane magnetic field as small as 25 mT is applied. In both NbN and NbN/MI hybrid, we find that the diode effect vanishes when the magnetic field is parallel to the sample plane. Our observations are consistent with the critical current being determined by the vortex surface barrier. Unequal barriers on the two edges of the superconductor strip result in the diode effect. Furthermore, the rectification is observed up to 10 K, which makes the device potential for diode based applications over a larger temperature range than before.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | BARRIER; DIODE; |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Experimental and Applied Physics > Chair Professor Weiss > Group Christoph Strunk |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 01 Feb 2024 10:07 |
| Last Modified: | 01 Feb 2024 10:07 |
| URI: | https://pred.uni-regensburg.de/id/eprint/58159 |
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