Dynamics of single vortices in grain boundaries: I-V characteristics on the femtovolt scale

B. Kalisky; J.R. Kirtley; E.A. Nowadnick; R.B. Dinner; E. Zeldov; A. Ariando; S. Wenderich; H. Hilgenkamp; D.M. Feldmann; K.A. Moler

doi:10.1063/1.3137164

Dynamics of single vortices in grain boundaries: I-V characteristics on the femtovolt scale

B. Kalisky, J.R. Kirtley, E.A. Nowadnick, R.B. Dinner, E. Zeldov, A. Ariando, S. Wenderich, H. Hilgenkamp, D.M. Feldmann, K.A. Moler

Faculty of Science and Technology

Research output: Contribution to journal › Article › Academic › peer-review

22 Citations (Scopus)

Abstract

We employed a scanning Hall probe microscope to detect the hopping of individual vortices between pinning sites along grain boundaries in YBa2Cu3O6+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.

Original language	English
Article number	202504
Journal	Applied physics letters
Volume	94
Issue number	20
DOIs	https://doi.org/10.1063/1.3137164
Publication status	Published - 2009

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10.1063/1.3137164

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title = "Dynamics of single vortices in grain boundaries: I-V characteristics on the femtovolt scale",

abstract = "We employed a scanning Hall probe microscope to detect the hopping of individual vortices between pinning sites along grain boundaries in YBa2Cu3O6+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.",

author = "B. Kalisky and J.R. Kirtley and E.A. Nowadnick and R.B. Dinner and E. Zeldov and A. Ariando and S. Wenderich and H. Hilgenkamp and D.M. Feldmann and K.A. Moler",

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T1 - Dynamics of single vortices in grain boundaries

T2 - I-V characteristics on the femtovolt scale

AU - Kalisky, B.

AU - Kirtley, J.R.

AU - Nowadnick, E.A.

AU - Dinner, R.B.

AU - Zeldov, E.

AU - Ariando, A.

AU - Wenderich, S.

AU - Hilgenkamp, H.

AU - Feldmann, D.M.

AU - Moler, K.A.

PY - 2009

Y1 - 2009

N2 - We employed a scanning Hall probe microscope to detect the hopping of individual vortices between pinning sites along grain boundaries in YBa2Cu3O6+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.

AB - We employed a scanning Hall probe microscope to detect the hopping of individual vortices between pinning sites along grain boundaries in YBa2Cu3O6+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.

U2 - 10.1063/1.3137164

DO - 10.1063/1.3137164

M3 - Article

VL - 94

JO - Applied physics letters

JF - Applied physics letters

SN - 0003-6951

IS - 20

M1 - 202504

ER -

Dynamics of single vortices in grain boundaries: I-V characteristics on the femtovolt scale

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