We have made zero-field current-voltage (IV) measurements of artificially layered high-T-c thin-film bridges. SQUID microscopy of these films provides Pearl lengths. longer than the bridge widths, and shows current distributions that are uniform across the bridges. At high temperatures and high currents the voltages follow the power law V proportional to I-n, with n = phi(2)(0)/8 pi(2)Lambda kT + 1, in good agreement with the predictions for thermally activated vortex motion. At low temperatures, the IV's are better fit by ln V linear in I-2, as expected if the low-temperature dissipation is dominated by quantum tunneling of individual Pearl vortices.

Tafuri, F., Kirtley, J., Born, D., Stornaiuolo, D., Medaglia, P.g., Orgiani, P., et al. (2006). Dissipation in ultra-thin current-carrying superconducting bridges; evidence for quantum tunneling of Pearl vortices. EUROPHYSICS LETTERS, 73(6), 948-954 [10.1209/epl/i2005-10485-3].

Dissipation in ultra-thin current-carrying superconducting bridges; evidence for quantum tunneling of Pearl vortices

MEDAGLIA, PIER GIANNI;BALESTRINO, GIUSEPPE;
2006

Abstract

We have made zero-field current-voltage (IV) measurements of artificially layered high-T-c thin-film bridges. SQUID microscopy of these films provides Pearl lengths. longer than the bridge widths, and shows current distributions that are uniform across the bridges. At high temperatures and high currents the voltages follow the power law V proportional to I-n, with n = phi(2)(0)/8 pi(2)Lambda kT + 1, in good agreement with the predictions for thermally activated vortex motion. At low temperatures, the IV's are better fit by ln V linear in I-2, as expected if the low-temperature dissipation is dominated by quantum tunneling of individual Pearl vortices.
Pubblicato
Rilevanza internazionale
Articolo
Sì, ma tipo non specificato
Settore FIS/03 - Fisica della Materia
English
Con Impact Factor ISI
vortex; superconductivity; thin films;
Tafuri, F., Kirtley, J., Born, D., Stornaiuolo, D., Medaglia, P.g., Orgiani, P., et al. (2006). Dissipation in ultra-thin current-carrying superconducting bridges; evidence for quantum tunneling of Pearl vortices. EUROPHYSICS LETTERS, 73(6), 948-954 [10.1209/epl/i2005-10485-3].
Tafuri, F; Kirtley, J; Born, D; Stornaiuolo, D; Medaglia, Pg; Orgiani, P; Balestrino, G; Kogan, V
Articolo su rivista
File in questo prodotto:
Non ci sono file associati a questo prodotto.

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2108/54431
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus ND
  • ???jsp.display-item.citation.isi??? 39
social impact