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有读书笔记Light-Induced Superconductivity in a Stripe-Ordered Cuprate

唐唐 添加于 2011-4-3 05:09 | 1261 次阅读 | 0 个评论
  •  作 者

    Fausti D, Tobey RI, Dean N, Kaiser S, Dienst A, Hoffmann MC, Pyon S, Takayama T, Takagi H, Cavalleri A
  •  摘 要

    One of the most intriguing features of some high-temperature cuprate superconductors is the interplay between one-dimensional “striped” spin order and charge order, and superconductivity. We used mid-infrared femtosecond pulses to transform one such stripe-ordered compound, nonsuperconducting La1.675Eu0.2Sr0.125CuO4, into a transient three-dimensional superconductor. The emergence of coherent interlayer transport was evidenced by the prompt appearance of a Josephson plasma resonance in the c-axis optical properties. An upper limit for the time scale needed to form the superconducting phase is estimated to be 1 to 2 picoseconds, which is significantly faster than expected. This places stringent new constraints on our understanding of stripe order and its relation to superconductivity.
  •  详细资料

    • 文献种类:期刊
    • 期刊名称: Science
    • 期刊缩写: Science
    • 期卷页: 2011  331 6014 189-191
    • ISBN: 0036-8075
  • 相关链接 DOI URL 

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    研究利用激光制得稀土超导材料
    近日,德国马普学会动态结构研究小组成功利用强红外激光脉冲照射将稀土氧化物陶瓷材料(La1.675Eu0.2Sr0.125CuO4)转变为高温超导体:在高于绝对零度20度的温度下,该稀土氧化物陶瓷材料在瞬间变成了超导体。
     
    研究结果证明:材料的非导电状态与导电状态之间没有明显区别,只需要百万分之一秒强红外激 光脉冲照射可使这些电子‘同步’进而具有导电性;而且非导电材料中电子已经处于同步状态,只是某些东西阻止了这些电子的运行,特定激光束可移除这些阻碍, 并释放出它们的导电性能。该项研究为材料导电性能产生提供了全新的研究方式,相关研究结果发表在《科学》杂志上。(来源:科技部)
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