• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>NATO Advanced Study Research Workshop on Symmetry and Heterogeneity in High Temperature Superconductors; 20031004-10; Erice(IT) >FESHBACH SHAPE RESONANCES IN MULTIBAND HIGH T_C SUPERCONDUCTORS
【24h】

FESHBACH SHAPE RESONANCES IN MULTIBAND HIGH T_C SUPERCONDUCTORS

机译：多频带高T_C超导体的FESHBACH形状共振

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

We describe particular nanoarchitectures (superlattices of superconducting wires and layers) where a mechanism to evade temperature decoherence effects in a quantum condensate is switched on by tuning the charge density. The superlattice structure determines the subbands and the corresponding Bloch wavefunctions of charge carriers at the Fermi level with different parity and different spatial locations. The disparity and negligible overlap between electron wave-functions in different subbands suppress the single electron interband impurity scattering rate and allow the multiband superconductivity in the clean limit. The quantum trick that bestows to the system the property to resist to the decoherence attacks of high temperature is the Feshbach shape resonance in the interband off-diagonal exchange-like pairing term i.e., in the quantum configuration interaction between pairing channels in different subbands. It occurs by tuning the chemical potential at a particular point near a Van Hove singularity (vHs) in the electronic energy spectrum, or a Lifshitz electronic topological transition (ETT), associated with the change of the dimensionality of the Fermi surface topology of one of the subbands.
机译：我们描述了特定的纳米体系结构（超导线和层的超晶格），其中通过调节电荷密度来开启逃避量子凝聚物中温度退相干效应的机制。超晶格结构确定了费米能级具有不同奇偶校验和不同空间位置的载流子的子带和相应的布洛赫波函数。不同子带中电子波函数之间的差异和可忽略的重叠抑制了单个电子带间杂质的散射速率，并使纯频带内的多带超导性成为可能。赋予系统抵抗高温退相干攻击的特性的量子技巧是带间非对角交换状配对术语中的Feshbach形状共振，即不同子带中配对通道之间的量子构型相互作用。它是通过调整电子能谱中范霍夫奇异性（vHs）或Lifshitz电子拓扑跃迁（ETT）附近特定点的化学势来实现的，该化学势与费米表面拓扑之一的维数变化相关子带。

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