超导量子态的精密测量

项目名称： 超导量子态的精密测量

项目编号： No.91221303

项目类型： 重大研究计划

立项/批准年度： 2013

项目学科： 物理学I

项目作者： 封东来

作者单位： 复旦大学

项目金额： 400万元

中文摘要： 本集成项目把精密的材料生长与薄膜构筑，和精密的角分辨光电子能谱、中子散射、输运性质测量、理论计算结合在一起，来研究新的超导量子现象和单量子效应，掌握超导体中的反铁磁涨落及其与超导电子相互作用的特征，研究其能隙结构、库伯对波函数和配对机制，以及超导与其它量子序之间的竞争与量子相变现象，阐明这些单量子态的产生和运动规律的微观机理。特别是通过各种实验手段对数个关键体系的协同作战，结合所设计的判据性实验，获取铁基超导的判据性实验结果，进一步揭示铁基超导体的超导配对机理包括电子配对强度、分布以及对称性等根本性问题，从而达到理解其超导机理。

中文关键词： 铁基超导体；配对机理；宏观量子态；；

英文摘要： This focusing project is to combine the precise bulk and thin film sample growth with the accurate measurements, including angle resolved photoemission spectroscopy, neutron scattering, transport, together with theoretical studies, to investigate novel superconducting phenomena, and macroscopic quantum effects. By studying the relation between antiferromagnetic spin fluctuations and their interaction with the electrons, we would study the superconducting gap structure, Cooper pair wave-functions, and pairing mechanism, and reveal how the superconducting phase interact and compete with other quantum orders and the nature of quantum critical phenomena thereof. Particularly, by combining different measurements on several critical iron-based superconductors with carefully designed smoking-gun experiments, their fundamental pairing mechanism, including the pairing strength, distribution and symmetry, would be revealed.

英文关键词： iron-based superconductor；paring mechanism；macroscopic quantum state；；