Approaching the theoretical depairing current in YBa2Cu3O7-x nanowires
Journal article, 2013

YBa2Cu3O7-x nanowires, with lateral dimensions smaller that 50 nm have been fabricated by a soft etching procedure preserving an Au capping layer on top of the nanostructure. We have obtained YBCO nanowires carrying critical current densities J(c) close to the theoretical depairing limit. The resistive transition and the J(c) as a function of temperature of the Au capped nanostructures have been compared with those where the Au protective layer was subsequently removed. We conclude that the Au capping layer together with the soft etching procedure are instrumental in preserving shape pristine superconducting properties very close to the as grown film. Our results open new perspective for the use of YBCO nanostructures in fundamental studies aiming at shedding light on the mechanism for high critical temperature superconductivity. (C) 2013 Elsevier B.V. All rights reserved.

Nanofabrication

superconductivity

transition

Phase slips

films

High-temperature superconductors

Author

Shahid Nawaz

Chalmers, Microtechnology and Nanoscience (MC2), Quantum Device Physics

Riccardo Arpaia

Chalmers, Microtechnology and Nanoscience (MC2), Quantum Device Physics

Thilo Bauch

Chalmers, Microtechnology and Nanoscience (MC2), Quantum Device Physics

Floriana Lombardi

Chalmers, Microtechnology and Nanoscience (MC2), Quantum Device Physics

Physica C: Superconductivity and its Applications

0921-4534 (ISSN)

Vol. 495 33-38

Subject Categories

Physical Sciences

DOI

10.1016/j.physc.2013.07.011