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首页> 外文期刊>Physical review >Vertical SNS weak-link Josephson junction fabricated from only boron-doped diamond
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Vertical SNS weak-link Josephson junction fabricated from only boron-doped diamond

机译:仅由掺硼金刚石制成的垂直SNS弱连接约瑟夫逊结

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摘要

A vertical superconductorormal conductor/superconductor (SNS) weak-link Josephson junction has been successfully fabricated from only homoepitaxial diamond films. Superconducting diamond, normal-state diamond, and superconducting diamond are homoepitaxially grown in a sequence. The temperature dependence of the critical superconducting current was fitted using Likharev's theory of SNS weak-link junctions. When the normal-state-diamond thickness L is much larger than the coherent length in the normal-state-diamond ξ_n, an exponential temperature dependence of normalized critical current was observed, indicating a proximity effect. Shapiro steps in the current-voltage characteristics under microwave irradiation were observed in the junction with L ξ_n.
机译:垂直超导体/法向导体/超导体(SNS)弱链接约瑟夫森结已经成功地仅由同质外延金刚石薄膜制成。超导金刚石,常态金刚石和超导金刚石按顺序同质外延生长。使用Likharev的SNS弱链接结理论拟合了临界超导电流的温度依赖性。当常态金刚石厚度L远大于常态金刚石ξ_n中的相干长度时,观察到归一化临界电流的指数温度依赖性,表明接近效应。在L ξ_n的结中观察到了在微波辐射下电流-电压特性的Shapiro阶跃。

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  • 来源
    《Physical review》 |2012年第18期|p.184516.1-184516.5|共5页
  • 作者单位

    School of Science and Engineering, Waseda University, 3-4-1 Okubo, Shinjyuku-ku, Tokyo 169-8555, Japan;

    School of Science and Engineering, Waseda University, 3-4-1 Okubo, Shinjyuku-ku, Tokyo 169-8555, Japan;

    School of Science and Engineering, Waseda University, 3-4-1 Okubo, Shinjyuku-ku, Tokyo 169-8555, Japan;

    School of Science and Engineering, Waseda University, 3-4-1 Okubo, Shinjyuku-ku, Tokyo 169-8555, Japan;

    School of Science and Engineering, Waseda University, 3-4-1 Okubo, Shinjyuku-ku, Tokyo 169-8555, Japan;

    National Institute for Materials Science, 1-2-1 Sengen, Tsukuba, Ibaraki 305-0047, Japan;

    National Institute for Materials Science, 1-2-1 Sengen, Tsukuba, Ibaraki 305-0047, Japan;

    School of Science and Engineering, Waseda University, 3-4-1 Okubo, Shinjyuku-ku, Tokyo 169-8555, Japan;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    proximity effects; Andreev effect; SN and SNS junctions; fullerenes and related materials; josephson devices; metal-insulator transitions and other electronic transitions;

    机译:邻近效应;安德列夫效应;SN和SNS交界处;富勒烯及相关物质;约瑟夫森装置;金属绝缘体过渡和其他电子过渡;

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