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首页> 外文期刊>Proceedings of the National Academy of Sciences of the United States of America >Universal non-Landau, self-organized, lattice disordering percolative dopant network sub-T_c phase transition in ceramic superconductors
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Universal non-Landau, self-organized, lattice disordering percolative dopant network sub-T_c phase transition in ceramic superconductors

机译：陶瓷超导体中的通用非Landau自组织晶格无序渗滤掺杂剂网络亚T_c相变

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摘要

Ceramic superconductors (cuprates, pnictides, etc.) exhibit universal features in both T_c~(max) and in their planar lattice disordering measured by EXAFS, as reflected by three phase transitions. The two highest temperature transitions are known to be associated with formation of Jahn-Teller pseudogaps and superconductive gaps, with corresponding Landau order parameters, but no new gap is associated with the third transition below T_c, and its origin is mysterious. It is argued that the third subT_c, transition is a dopant glass transition, which is remarkably similar to topological transitions previously observed in chalcogenide and oxide alloy network glasses (like window glass).
机译：陶瓷超导体（铜酸盐，磷化物等）在T_c〜（max）及其通过EXAFS测量的平面晶格无序中均表现出通用特征，这体现在三个相变上。已知两个最高的温度转变与Jahn-Teller伪间隙和超导间隙的形成有关，具有相应的Landau阶参数，但是在T_c以下的第三次转变没有新的间隙，并且其起源是神秘的。有人认为，第三个subT_c跃迁是一种掺杂剂玻璃跃迁，与先前在硫族化物和氧化物合金网络玻璃（如窗户玻璃）中观察到的拓扑跃迁非常相似。

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