发现极端量子极限下的分立磁通态  

Exploring vortex bound states under extremely quantum limit

作　　者：侯兴元 单磊 HOU XingYuan;SHAN Lei(Information Materials and Intelligent Sensing Laboratory of Anhui Province,Institutes of Physical Science and Information Technology,Anhui University,Hefei 230601,China;Key Laboratory of Structure and Functional Regulation of Hybrid Materials of Ministry of Education,Anhui University,Hefei 230601,China)

机构地区：[1]安徽大学物质科学与信息技术研究院,信息材料与智能感知安徽省实验室,合肥230601 [2]安徽大学杂化材料结构与功能调控教育部重点实验室,合肥230601

出　　处：《中国科学：物理学、力学、天文学》2021年第11期130-132,共3页Scientia Sinica Physica,Mechanica & Astronomica

基　　金：国家自然科学基金(编号:12074002,11804379);国家重点基础研究发展计划(编号:2017YFA0302904,2018YFA0305602);安徽省领军人才团队项目(2019-16);山东省基金重大基础研究项目(编号:ZR202105280001)资助。

摘　　要：第Ⅱ类超导体中的磁通态一直是超导研究领域的热点之一,利用扫描隧道谱的方法,人们通常可以观测到具有半整数倍分立能级的磁通束缚态.最近,研究人员发现在极端量子极限下,磁通附近的准粒子态密度出现Friedel振荡调制,并导致磁通束缚态的分立能级偏离于通常情况下的预期.该结果对更精确地认知第Ⅱ类超导体中的磁通态提供了重要的实验和理论支持.The vortex state of type-Ⅱ superconductors is vital for both fundamental physics and applications. Earlier research works have revealed discrete vortex-bound states near a vortex core with half-integer energy levels. Most recently, the energy levels under an extremely quantum limit were observed in an iron-based superconductor, which are considerably modified through the Friedel-like oscillation of superconducting order parameter, thus deviating from the traditional law.These results highlight a general understanding of the vortex core state in type-Ⅱ superconductors.

关 键 词：铁基超导体 磁通态 扫描隧道谱 量子极限 

分 类 号：O469[理学—凝聚态物理]