• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Philosophical magazine, B. Physics of condensed matter, electronic, optical, and magnetic properties >Resonant pair tunnelling and singular effects of c-axis disorder in cuprate and organic superconductors
【24h】

Resonant pair tunnelling and singular effects of c-axis disorder in cuprate and organic superconductors

机译：铜酸盐和有机超导体中的共振对隧穿和c轴紊乱的奇异效应

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

In the interlayer pair tunnelling theory of superconductivity, the large scale of T-c has its origin in the k-space locality of the pair tunnelling matrix elements. We give a complementary interpretation of the same physics as a process of resonant pair tunnelling and illustrate it through Cooper pair analysis. This interpretation is used to give a mechanism which leads to a singular suppression of T-c as a function of c-axis (off-plane or off-axis) disorder. In this mechanism the nonresonant tunnelling processes arising from the c-axis disorder in general contributes a pair binding energy which is reduced by a factor of the order of T-J/epsilon(F), where T-J is the interlayer pair tunnelling matrix element and epsilon(F) is the Fermi energy. This leads to a simple theorem which states that the scale of T-c is controlled by the space average value of the bare one-electron interlayer hopping matrix element. After briefly discussing the fact that the organic superconductors based on ET and tetramethyltetraselenafulvalene molecules are strongly correlated narrow-band systems, the dramatic reduction in T-c due to anion disorder in organic superconductors is explained by our mechanism. Off-plane disorder effects in some of the cuprates are also discussed.
机译：在超导层间成对隧穿理论中，大规模的T-c起源于成对隧穿矩阵元素的k空间局部性。我们对共振对隧穿过程的相同物理学给出了补充解释，并通过Cooper对分析进行了说明。该解释用于给出一种机制，该机制导致作为c轴（离平面或离轴）混乱的函数的T-c的奇异抑制。在这种机制中，由c轴紊乱引起的非共振隧穿过程通常会贡献一对键合能，该键合能降低TJ / epsilon（F）的数量级，其中TJ是层间成对隧穿矩阵元素和epsilon（ F）是费米能量。这导致一个简单的定理，该定理指出，T-c的尺度由裸露的单电子层间跳跃矩阵元素的空间平均值控制。在简要讨论了基于ET和四甲基四硒富勒烯分子的有机超导体是高度相关的窄带系统这一事实之后，我们的机理解释了由于有机超导体中的阴离子紊乱导致T-c的急剧降低。还讨论了某些铜酸盐中的平面外失调效应。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号