Anisotropy, disorder, and commensurability in superconducting networks

M. A. Itzler, C. W. Wilks, P. M. Chaikin

    Research output: Contribution to journalArticlepeer-review

    Abstract

    We report on recent experiments on electron beam lithographically prepared superconducting wire networks. In square networks we have found that along with the dips in the Tc vs. φ/φ0 phase boundary at rational fields, there is an even more pronounced effect of rationality on the width of the resistive transition. We have disordered several types of networks, fit the phase boundary excellently with the J2 model and shown that there is no critical field or amount of disorder above which the phase boundary loses periodic structure. We have introduced anisotropy into the square lattice by varying the thickness of the horizontal and vertical wires. This produces an anisotropic “phase boundary”, dependent on the direction inn which the anisotropy is probed, that is in good agreement with calculations for anisotropic tight binding bands in a strong field. We have found a unique way to disorder a quasi-crystalline network and used it to demonstrate that commensurate states are directly related to the inflation properties of the network.

    Original languageEnglish (US)
    Pages (from-to)1637-1638
    Number of pages2
    JournalPhysica B: Condensed Matter
    Volume165-166
    DOIs
    StatePublished - 1990

    ASJC Scopus subject areas

    • Electronic, Optical and Magnetic Materials
    • Condensed Matter Physics
    • Electrical and Electronic Engineering

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