超导能隙振荡: 到底来自配对密度波还是拆对散射?  

Superconducting gap modulations:Are they from pair density waves or pair-breaking scattering?

作　　者：殷嘉鑫 王强华[2] Yin Jia-Xin;Wang Qiang-Hua(Department of Physics,Southern University of Science and Technology,Shenzhen 518055,China;National Laboratory of Solid State Microstructures,School of Physics,Nanjing University,Nanjing 210093,China)

机构地区：[1]南方科技大学物理系,深圳518055 [2]南京大学物理学院,固体微结构物理国家重点实验室,南京210093

出　　处：《物理学报》2024年第15期5-7,共3页Acta Physica Sinica

摘　　要：早在1965年,于渌先生发表在《物理学报》的经典理论工作就指出:超导能隙在磁性杂质周围会产生微弱的周期性振荡.近十年来,一系列高分辨率的扫描隧道显微实验观测到超导体内能隙在空间中的微弱振荡行为并指认为配对密度波.据此情况,李东海等理论学者近期指出,在多种情况下,杂质拆对散射构成的干涉效应也会导致能隙在空间形成周期性振荡.我们讨论这两种观点的对立与统一,以及它们和实验的联系.In his seminal work published in Acta Physica Sinica in 1965,Yu Lu pointed out that the superconducting gap exhibits weak modulations near the pair-breaking magnetic impurity in a superconductor.In the past ten year,a series high-resolution scanning tunneling microscopy works reported weak superconducting gap modulations in certain superconductors and explained these phenomena as pair density waves.In line with Yu Lu’s discovery,Lee D H et al.pointed out that in many cases,the interference effect of pair-breaking scattering can also lead to superconducting gap modulations in space.We will discuss the distinction and unification of these two kinds of mechanisms,as well as their relevance to recent experimental observations.

关 键 词：超导 配对密度波 扫描隧道显微镜 

分 类 号：O469[理学—凝聚态物理]