| Issue |
EPL
Volume 101, Number 6, March 2013
|
|
|---|---|---|
| Article Number | 67005 | |
| Number of page(s) | 6 | |
| Section | Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties | |
| DOI | https://doi.org/10.1209/0295-5075/101/67005 | |
| Published online | 03 April 2013 | |
Periodic negative magnetoresistance in granular YBa2Cu3O7−δ nanowires
1 Department of Physics, Institute of Superconductivity and Institute of Nanotechnology and Advanced Materials, Bar-Ilan University - Ramat-Gan 52900, Israel
2 Department of Physics, Technion - Israel Institute of Technology - Haifa 32000, Israel
Received: 24 January 2013
Accepted: 26 February 2013
Magneto-transport measurements in YBa2Cu3O7−δ nanowires, comprising a single layer of a small number of grains, reveal periodic magnetoresistance oscillations in a wide temperature range below the transition. The rich structure of these oscillations manifests a negative magnetoresistance in the initial part of each cycle beginning at zero magnetic field. The salient features of these unique oscillations indicate the presence of π Josephson junctions in the granular wires, arising from the d-wave pairing symmetry in YBa2Cu3O7−δ.
PACS: 74.81.Bd – Granular, melt-textured, amorphous, and composite superconductors / 74.72.-h – Cuprate superconductors
© EPLA, 2013
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