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Soft Nanostructuring of YBCO Josephson Junctions by Phase Separation

David Gustafsson (Institutionen för mikroteknologi och nanovetenskap, Kvantkomponentfysik) ; H. Pettersson ; Beniamino Iandolo (Institutionen för mikroteknologi och nanovetenskap) ; Eva Olsson (Institutionen för teknisk fysik, Mikroskopi och mikroanalys) ; Thilo Bauch (Institutionen för mikroteknologi och nanovetenskap, Kvantkomponentfysik) ; Floriana Lombardi (Institutionen för mikroteknologi och nanovetenskap, Kvantkomponentfysik)
Nano Letters (1530-6984). Vol. 10 (2010), 12, p. 4824-4829.
[Artikel, refereegranskad vetenskaplig]

We have developed a new method to fabricate biepitaxial YBa2Cu3O7-delta (YBCO) Josephson junctions at the nanoscale allowing junctions widths down to 100 nm and simultaneously avoiding the typical damage in grain boundary interfaces due to conventional patterning procedures By using the competition between the superconducting YBCO and the insulating Y-2 BaCuO5 phases during film growth we formed nanometer sized grain boundary junctions in the insulating Y2BaCuO5 matrix as confirmed by high resolution transmission electron microscopy Electrical transport measurements give clear indications that we are close to probing the intrinsic properties of the grain boundaries.

Nyckelord: High, critical, temperature, superconductor, nanoSQUID, grain boundary, junction, yttrium barium copper oxide, nanojunctions, soft, nanopatterning, t-c, thin-films, devices

Denna post skapades 2011-01-03. Senast ändrad 2016-08-18.
CPL Pubid: 132201


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