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Observation of mesoscopic conductance fluctuations in YBa2Cu3O7-delta grain boundary Josephson junctions

A. Tagliacozzo ; D. Born ; D. Stornaiuolo ; E. Gambale ; D. Dalena ; Floriana Lombardi (Institutionen för mikroteknologi och nanovetenskap) ; A. Barone ; B. L. Altshuler ; F. Tafuri
Physical Review B. Condensed Matter and Materials Physics (1098-0121). Vol. 75 (2007), 1, p. 012507.
[Artikel, refereegranskad vetenskaplig]

Magnetofluctuations of the normal-state resistance R-N have been reproducibly observed in high-critical-temperature superconductor (HTS) grain boundary junctions at low temperatures. We attribute them to mesoscopic transport in narrow channels across the grain boundary line. The Thouless energy appears to be the relevant energy scale. Our findings have significant implications for quasiparticle relaxation and coherent transport in HTS grain boundaries.

Nyckelord: high-t-c, temperature superconductors, metals



Denna post skapades 2013-01-28. Senast ändrad 2013-01-30.
CPL Pubid: 172292

 

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Institutioner (Chalmers)

Institutionen för mikroteknologi och nanovetenskap

Ämnesområden

Den kondenserade materiens fysik

Chalmers infrastruktur