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Title: Dynamics of single vortices in grain boundaries: I-V characteristics on the femtovolt scale
Authors: Kalisky, B.
Kirtley, J.R.
Nowadnick, E.A.
Dinner, R.B.
Zeldov, E.
Wenderich, S.
Hilgenkamp, H.
Feldmann, D.M.
Moler, K.A.
Issue Date: 2009
Citation: Kalisky, B., Kirtley, J.R., Nowadnick, E.A., Dinner, R.B., Zeldov, E., Ariando, Wenderich, S., Hilgenkamp, H., Feldmann, D.M., Moler, K.A. (2009). Dynamics of single vortices in grain boundaries: I-V characteristics on the femtovolt scale. Applied Physics Letters 94 (20) : -. ScholarBank@NUS Repository.
Abstract: We employed a scanning Hall probe microscope to detect the hopping of individual vortices between pinning sites along grain boundaries in YBa 2Cu3O6+δ thin films in the presence of an applied current. Detecting the motion of individual vortices allowed us to probe the current-voltage (I-V) characteristics of the grain boundary with voltage sensitivity below a femtovolt. We find a very sharp onset of dissipation with V ∞ In with an unprecedented high exponent of n≈290 that shows essentially no dependence on temperature or grain boundary angle. Our data have no straightforward explanation within the existing grain boundary transport models. © 2009 American Institute of Physics.
Source Title: Applied Physics Letters
ISSN: 00036951
DOI: 10.1063/1.3137164
Appears in Collections:Staff Publications

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