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; 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, Ariando, S. Wenderich, H. Hilgenkamp, D. M. Feldmann, K. A. Moler

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24 Scopus citations

Abstract

We employed a scanning Hall probe microscope to detect the hopping of individual vortices between pinning sites along grain boundaries in YBa ₂Cu₃O_6+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
State	Published - 2009
Externally published	Yes

Bibliographical note

Funding Information:
The authors would like to thank Janice Guikema and Clifford Hicks for Hall sensors, H. Karapetyan for help in measurements, and M. Beasley and A. Gurevich for useful discussions. This work is funded by an Air Force Multi-University Research Initiative (MURI), by the Center for Probing the Nanoscale (CPN), an NSF NSEC, NSF Grant no. PHY-0425897, and by the U.S.-Israel Binational Science Foundation (BSF). E.Z. acknowledges the support of EUContract No. EU FP7 ERC-AdG.

Funding

The authors would like to thank Janice Guikema and Clifford Hicks for Hall sensors, H. Karapetyan for help in measurements, and M. Beasley and A. Gurevich for useful discussions. This work is funded by an Air Force Multi-University Research Initiative (MURI), by the Center for Probing the Nanoscale (CPN), an NSF NSEC, NSF Grant no. PHY-0425897, and by the U.S.-Israel Binational Science Foundation (BSF). E.Z. acknowledges the support of EUContract No. EU FP7 ERC-AdG.

Funders	Funder number
Air Force Multi-University Research Initiative
FP7 ERC-AdG
National Science Foundation	PHY-0425897
Bonfils-Stanton Foundation
Seventh Framework Programme	226246
Multidisciplinary University Research Initiative
United States-Israel Binational Science Foundation

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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 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.",

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

note = "Also in: Virtual Journal of Applications of Superconductivity, June 1, 2009",

year = "2009",

doi = "10.1063/1.3137164",

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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,

AU - Wenderich, S.

AU - Hilgenkamp, H.

AU - Feldmann, D. M.

AU - Moler, K. A.

N1 - Also in: Virtual Journal of Applications of Superconductivity, June 1, 2009

PY - 2009

Y1 - 2009

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AB - 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.

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

Abstract

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