English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

It has been suggested [Pierson et al., Phys. Rev. B 60, 1309 (1999); Ammirataet al., Physica C 313, 225 (1999)] that for 2D superconductors there exists aphase transition with the dynamic critical exponent z\approx 5.6. We performsimulations for the 2D RSJ model and compare the results with the experimentaldata in Repaci et al. obtained for an ultrathin YBCO sample [Phys. Rev. B 54,R9674 (1996)]. We then use a different method of analyzing dynamic scaling thanin Pierson et al., and conclude that both the simulations and the experimentsare consistent with a conventional Kosterlitz Thouless (KT) transition in thethermodynamic limit for which z=2. For finite systems, however, we find both insimulations and experiments that the change in the current-voltage (IV)characteristics caused by the finite size shows a scaling property with anexponent alpha \approx 1/6, seemingly suggesting a vanishing resistance at atemperature for which z=1/alpha. It is pointed out that the dynamic criticalexponent found in Pierson et al. corresponds to the exponent 1/alpha. It isemphasized that this scaling property does not represent any true phasetransition since in reality the resistance vanishes only at zero temperature.Nevertheless, the observed scaling behavior associated with alpha \approx 1/6appears to be a common and intriguing feature for the finite size caused changein the IV characteristics around the KT transition.Comment: 12 pages, 14 figures, accepted in Phys.Rev.

physical review. b, condensed matter

Analysis of current-voltage characteristics of two-dimensional superconductors: Finite-size scaling behavior in the vicinity of the Kosterlitz-Thouless transition