摘要
文章回顾了中子散射在高温超导铜氧化合物磁激发研究中的最新进展.自从铜氧化合物在20年前被发现以后,理解它们超导电性的微观来源一直是凝聚态物理中的核心课题.在传统超导体中,使得电子成对形成超导态的相互作用是以晶格振动(声子)为媒介的.而对于铜氧化合物的超导机理,人们通常认为磁激发可能起到根本的作用,因为超导电性是在可移动的“电子”或“空穴”掺杂到反铁磁母体化合物之后才发生的.文章总结了过去20年来利用非弹性中子散射研究磁激发的关键结果和现状,并指出了将来可能的研究方向.
We review current progress in the neutron scattering studies of magnetic excitations in high-transition temperature （high-To） copper oxide superconductors. Since its discovery 20 years ago, understanding the microscopic origin of superconductivity in these copper oxides has been the＂ holy-grill＂ in condensed matter physics. In contrast to conventional superconductors, where the interaction that pairs the electrons to form the superconducting state is mediated by lattice vibrations （phonons）, it is generally believed that magnetic excitations might play a fundamental role in the superconducting mechanism of copper oxides because superconductivity occurs when mobile ＂electrons＂ or ＂holes＂ are doped into the antiferromagnetic parent compounds. In this review, we summarize the key results on the magnetic excitations obtained by inelastic neutron scattering over the past 20 years. We discuss the status of the field and point out possible future directions.
出处
《物理》
CAS
北大核心
2006年第10期837-844,共8页
Physics
基金
中国科学院“超导和非常规电子态国际合作团队”计划(ITSCNEM)的支持.
关键词
高温超导体
中子散射
磁共振峰
磁非公度峰
high-temperature superconductor, neutron scattering, magnetic resonance, magnetic incommensurability
作者简介
通讯联系人．Email：daip@ornl.gov
