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A superconducting investigation of nanoscale mechanics in niobium quantum point contacts.

机译:铌量子点接触中纳米尺度力学的超导研究。

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摘要

Research into molecular electronics has exploded in recent years due to a proliferation of new and exciting techniques for producing atomic level structures (e-beam lithography, self-assembled monolayers, etc.); coupling these techniques with the ability to accurately manipulate atomic systems (such as with Scanning Tunneling Microscopes (STM), Atomic Force Microscopes (AFM), or Mechanically Controllable Break Junctions (MCBJ)) opens the possibility to create novel quantum coherent devices for both engineering applications, as well as research into fundamental physics. Along these lines, presented here is a series of experiments on superconducting point contacts which were aimed at understanding the dynamics of coupling superconducting effects to the mechanical degrees of freedom of a nanowire. In addition, another series of experiments presented here explore the nature of charge transport at high biases in superconducting point contacts. Specifically, an investigation of point contacts at high voltage biases revealed a suppression of one component of the total current, which is explained through a phenomenological model.
机译:近年来,由于产生原子级结构(电子束光刻,自组装单层等)的新技术令人兴奋,对分子电子学的研究激增。将这些技术与精确操纵原子系统的能力相结合(例如使用扫描隧道显微镜(STM),原子力显微镜(AFM)或机械可控断裂结(MCBJ)),有可能为两种工程创建新颖的量子相干器件应用,以及对基础物理学的研究。沿着这些思路,这里提出了一系列关于超导点接触的实验,旨在理解将超导效应耦合到纳米线的机械自由度的动力学。此外,这里介绍的另一系列实验探索了超导点接触中高偏压下电荷传输的本质。具体而言,对高电压偏置下的点接触进行研究后发现,总电流的一个分量受到了抑制,这通过现象模型进行了解释。

著录项

  • 作者

    Donehoo, Brandon.;

  • 作者单位

    Georgia Institute of Technology.;

  • 授予单位 Georgia Institute of Technology.;
  • 学科 Physics Condensed Matter.
  • 学位 Ph.D.
  • 年度 2008
  • 页码 206 p.
  • 总页数 206
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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