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首页> 外文期刊>Physical review >Fermi surface of underdoped cuprate superconductors from interlayer magnetoresistance: Closed pockets versus open arcs
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Fermi surface of underdoped cuprate superconductors from interlayer magnetoresistance: Closed pockets versus open arcs

机译:层间磁致电阻使掺杂不足的铜酸盐超导体的费米表面:封闭的腔与开弧

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摘要

An outstanding question about the underdoped cuprates concerns the true nature of their Fermi surface which appears as a set of disconnected arcs. Theoretical models have proposed two distinct possibilities: (1) each arc is the observable part of a partially hidden closed pocket and (2) each arc is open, truncated at its apparent ends. We show that measurements of the variation in the interlayer resistance with the direction of a magnetic field parallel to the layers can qualitatively distinguish closed pockets from open arcs. This is possible because the field can be oriented such that all electrons on arcs encounter a large Lorentz force and resulting magnetoresistance whereas some electrons on pockets escape the effect by moving parallel to the field.
机译:关于掺杂不足的铜酸盐的一个悬而未决的问题涉及其费米表面的真实性质,费米表面表现为一组不连续的弧。理论模型提出了两种不同的可能性:(1)每个弧是部分隐藏的闭合凹穴的可观察部分,并且(2)每个弧是开放的,在其明显的末端被截断。我们表明,在层间电阻随平行于各层的磁场方向变化的情况下,可以定性地将闭合腔与开弧区分开。这是可能的,因为磁场的方向可以使电弧上的所有电子都遇到大的洛伦兹力并产生磁阻,而凹穴上的一些电子则通过平行于磁场移动而逃脱了这种作用。

著录项

  • 来源
    《Physical review》 |2010年第17期|p.172510.1-172510.4|共4页
  • 作者

    M. F. Smith; Ross H. McKenzie;

  • 作者单位

    School of Physics, Suranaree University of Technology, Nakhon Ratchasima 30000, Thailand,Department of Physics, University of Queensland, Brisbane 4072, Australia;

    Department of Physics, University of Queensland, Brisbane 4072, Australia;

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

    electronic structure; metals and alloys;

    机译:电子结构金属和合金;

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