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首页> 外文学位 >Strongly correlated electron behavior in arsenic-based and thin film antimony-based filled skutterudites.
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Strongly correlated electron behavior in arsenic-based and thin film antimony-based filled skutterudites.

机译：在砷基和薄膜锑基填充方钴矿中，电子行为密切相关。

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摘要

Results for two categories of filled skutterudites that have previously received limited attention are presented: (1) single crystals of the As-based filled skutterudites and (2) thin films of the Sb-based filled skutterudites. We show that the compounds CeT4As 12 (T = Ru, Os) exhibit non-Fermi liquid and Kondo insulator behavior, respectively. The phenomena seen in these materials is discussed in terms of strong hybridization between the localized f-electron states and the conduction electron states, with various perturbing factors. Results for thin films of the compounds PrFe4Sb 12 and YbFe4Sb12, which were synthesized by the pulsed laser deposition technique, are also presented. Measurements of the PrFe4Sb12 specimens indicate that the films are single phase and exhibit behavior that is comparable to that seen in bulk specimens. To explore the affect of film thickness, YbFe4Sb12 specimens were synthesized where t was varied from 6000 to 300 A. Thick films (t > 1000 A) show electrical transport behavior similar to that seen for bulk specimens. A metal to insulator transition is observed for thin films (t 1000 A) which is correlated with film topology.
机译：给出了以前很少受到关注的两类填充方钴矿的结果：（1）As基填充方钴矿的单晶和（2）Sb基填充方钴矿的薄膜。我们表明，化合物CeT4As 12（T = Ru，Os）分别表现出非费米液体和近藤绝缘子的行为。这些材料中出现的现象是根据局部f电子态与传导电子态之间的强杂化以及各种扰动因素进行讨论的。还介绍了通过脉冲激光沉积技术合成的化合物PrFe4Sb 12和YbFe4Sb12薄膜的结果。 PrFe4Sb12样品的测量结果表明，该膜是单相的，其行为与散装样品中的行为相当。为了探索膜厚度的影响，合成了YbFe4Sb12样品，其中t在6000到300 A之间变化。厚膜（t> 1000 A）的电传输行为与散装样品相似。对于薄膜（t <1000 A），观察到金属到绝缘体的转变，这与薄膜拓扑相关。

著录项

  • 作者

    Baumbach, Ryan Eagle.;

  • 作者单位

    University of California, San Diego.;

  • 授予单位 University of California, San Diego.;
  • 学科 Physics Condensed Matter.
  • 学位 Ph.D.
  • 年度 2009
  • 页码 135 p.
  • 总页数 135
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 O49;
  • 关键词

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