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首页> 外文会议>Proceedings vol.2003-29; Epitaxial Growth of Functional Oxides Symposium and Electrochemical Society Meeting; 20031012-17; Orlando,FL(US) >ENHANCED T_C NEAR THE METAL/INSULATOR TRANSITION: A NEW TOOL IN THE SEARCH FOR SUPERCONDUCTING MATERIALS
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ENHANCED T_C NEAR THE METAL/INSULATOR TRANSITION: A NEW TOOL IN THE SEARCH FOR SUPERCONDUCTING MATERIALS

机译：金属/绝缘体过渡附近的增强T_C：超导材料搜索中的新工具

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摘要

Many apparently unrelated systems, including disordered metals and metallic oxides, undergo a metal/insulator transition (MIT) when their carrier concentrations are reduced and/or their disorder is increased. We have found that the superconducting transition temperature, T_c, of such materials is very often enhanced in the vicinity of the MIT. We have constructed superconductivity phase diagrams (T_c vs σ, the conductivity) for many materials whose only common feature is proximity to the MIT and found that they are remarkably similar. These results suggest that there is a common mechanism for the enhancement of superconductivity near the MIT that can be used as a guide in the search for new superconducting materials.
机译：当降低其载流子浓度和/或增加其无序度时，许多显然无关的系统，包括无序的金属和金属氧化物，都会经历金属/绝缘体转变（MIT）。我们发现，这种材料的超导转变温度T_c在MIT附近通常会提高。对于许多材料的唯一共同特征是与MIT接近，我们已经构建了超导相图（T_c与σ，电导率），发现它们非常相似。这些结果表明，在麻省理工学院附近存在一种增强超导性的通用机制，可以用作寻找新的超导材料的指南。

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