Regulation of superconductivity in Nb thin films induced by interstitial oxygen atoms  

作　　者：Yuchuan Liu Ming Yang Yun Fan Zulei Xu Yu Wu Yixin Liu Wei Peng Gang Mu Zhi-Rong Lin 刘钰川;杨明;范云;徐祖磊;吴禹;刘以鑫;彭炜;牟刚;林志荣

机构地区：[1]Shanghai University,Shanghai 200444,China [2]State Key Laboratory of Materials for Integrated Circuits,Shanghai Institute of Microsystem and Information Technology,Chinese Academy of Sciences,Shanghai 200050,China [3]University of Chinese Academy of Sciences,Beijing 100049,China

出　　处：《Chinese Physics B》2025年第4期560-565,共6页中国物理B(英文版)

基　　金：Project supported by the Strategic Priority Research Program of the Chinese Academy of Sciences(Grant No.XDB0670000);the National Key Research and Development Program of China(Grant No.2023YFB4404904);the Key-Area Research and Development Program of Guangdong Province,China(Grant No.2020B0303030002);the Autonomous Deployment Project of State Key Laboratory of Materials for Integrated Circuits(Grant No.SKLJC-Z2024-B04).

摘　　要：The regulation of superconductivity in thin films can provide important information on low-dimensional superconducting properties,and also has important reference values for the application in superconducting devices.Herein,we report the successful regulation of both the superconductivity and normal-state properties of Nb films in a wide range by the controllable introduction of interstitial oxygen atoms.The lattice parameter is enhanced for an extent as large as 4.4%,and the normal-state resistivityρ_(n)is tuned for more than 15 times.The slope of upper critical field near T_(c)shows a close correlation withρ_(n)in a wide range.Importantly,it is found that the suppression of T_(c)by disorder reveals a linear dependence withρ_(n)in the region with an unchanged crystalline quality,which can be understood based on the picture of three-dimensional ballistic motion.

关 键 词：Nb film regulation of superconductivity upper critical field 

分 类 号：O469[理学—凝聚态物理]