摘要 近年来,随着相关技术的快速发展,单轴应变或单轴压强技术在研究非常规超导体中被广泛地应用.在单轴压强或单轴应变研究中,样品沿着某个晶轴的方向发生应变,其物理性质也会发生相应的改变.通过研究这种改变,就可能获得超导或其他序的重要信息.和静水压相比,单轴压强对物理性质的改变主要和对称性有关,这使得单轴压强和单轴应变的研究特别适用于与对称性相关联的物理性质,例如,与旋转对称性相关的电子向列相.更重要的是,单轴压强技术也能够用于超导电性性质的研究.本文将介绍常用的单轴压强和单轴应变装置和技术,并介绍其在铁基超导体和其他超导体中的一些典型应用.表明单轴压强和单轴应变技术在研究电子向列相、超导序参量和其他一些竞争序方面具有独特的优势,并将随着相关技术的发展在超导及其他强关联电子体系研究中发挥更重要的作用. Because of the rapid development of the uniaxial pressure device in recent years,the uniaxial pressure or strain technique has been increasingly applied to study unconventional superconductors.The physical properties of a sample will change with the uniaxial strain along a particular lattice axis,providing us with important information regarding superconductivity and other characteristics.When compared with hydrostatic pressure measurement,changes in physical properties with the uniaxial pressure are mainly associated with symmetry,making this methodology particularly suitable for studying the symmetry-related properties of a system such as the electronic nematic phase with rotational symmetry breaking.Furthermore,the uniaxial pressure technique can be used to study the superconducting properties.In this review,we will briefly introduce some typical uniaxial pressure and uniaxial strain devices and techniques and their applications on iron-based superconductors as well as other superconductors.The uniaxial pressure technique exhibits some unique advantages with respect to the study of electronic nematicity,superconductivity,and some other competing orders.With further development,the uniaxial pressure technique is expected to play increasingly important roles in the study of superconductors and other strongly correlated systems.
出处 《中国科学:物理学、力学、天文学》 CSCD 北大核心 2021年第4期184-200,共17页 Scientia Sinica:Physica,Mechanica & Astronomica
基金 国家自然科学基金(编号:11874401,11674406,11961160699) 国家重点基础研究发展计划(编号:2017YFA0302900,2016YFA0300500) 中国科学院战略性先导科技专项(编号:XDB33000000)资助项目。
分类号 G63 [文化科学—教育学]
