Effect of submicron holes on the vortex dynamics of a superconducting microbridge
J. Bentner, D. Babić, C. Sürgers, C. Strunk
DOI 10.1103/PhysRevB.70.184516 · Physical Review B
Active bibliographic source — not scientific approval
Bibliographic access preserves source history; it does not approve extracted materials or validate reported claims. Review warnings on each occurrence separately.
Abstract
We measured and compared the electric field vs current density characteristics in the vortex state of two amorphous Nb0.7Ge0.3 microbridges, with and without a line of submicron holes patterned along the sample axis. The power dissipation in the perforated sample exhibits a crossover, being reduced at temperatures well below the superconducting transition temperature Tc and unexpectedly enhanced close to Tc. At low temperatures the holes are efficient artificial pinning centers and reduce the average vortex velocity. We argue that the dissipation enhancement close to Tc is a consequence of a combination of the weakened pinning by the holes and an inhomogeneous driving-current distribution in their vicinity, which results in an increased average vortex velocity as well as in a channeling of the vortex motion through the holes.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Nb0.7Ge0.3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 2.75 | Pressure not reported | unknown |
Similar papers
Vortex dynamics in the presence of a line of submicron holes along a superconducting microbridge
similarity 0.95J. Bentner et al. · 2004 · arXiv:cond-mat/0404292
Source status unknown — claims are unverified
Electron localization effects on the low-temperature high-field magnetoresistivity of three-dimensional amorphous superconductors
similarity 0.93A. V. Samoilov et al.
Source status unknown — claims are unverified
Flux-line shear through narrow constraints in superconducting films
similarity 0.92A. Pruymboom et al.
Source status unknown — claims are unverified
Magnetoresistance oscillations in superconducting granular niobium nitride nanowires
similarity 0.91U. Patel et al.
Source status unknown — claims are unverified
Proximity-induced superconducting gap in the intrinsic magnetic topological insulator MnBi2Te4
similarity 0.90Wen-Zheng Xu et al.
Source status unknown — claims are unverified
Nb-Based Nanoscale Superconducting Quantum Interference Devices Tuned by Electroannealing
similarity 0.90Simon Collienne et al.
Source status unknown — claims are unverified