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Improving ion irradiated high Josephson junctions by annealing: The role of vacancy-interstitial annihilation
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View: Figures


Image of FIG. 1.
FIG. 1.

(Color online) Normalized resistance as a function of temperature for JJ made on the same wafer by oxygen ion irradiation, and then further annealed for different times (, , and and ). The arrows indicate the maximum spread in for a given annealing time.

Image of FIG. 2.
FIG. 2.

Critical current as a function of the reduced temperature for the Josephson junctions irradiated at for different annealing times (, , and .). Lines between the curves are a guide for the eyes. Arrows indicate the mean value and the spread of at . The insert shows and the product for the JJ irradiated at as functions of the annealing time.

Image of FIG. 3.
FIG. 3.

spread as a function of for the JJ made on the same wafer by (closed symbols) and (open symbols) oxygen ion irradiation. Shown in solid lines are the simulation results for the vacancy-interstitial annihilation model, and in dashed lines are those for the diffusion mechanism.


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Improving ion irradiated high Tc Josephson junctions by annealing: The role of vacancy-interstitial annihilation