Observation of lateral long range order in superconducting FeTe thin films

作     者：李位勇 韩烨 王焕华 曹立新 贾全杰 陈雨 姜晓明 董成 许波 赵柏儒 

作者机构：National Laboratory for SuperconductivityInstitute of Physics and Beijing National Laboratory for Condensed Matter PhysicsChinese Academy of Sciences Institute of High Energy PhysicsChinese Academy of Sciences 

出 版 物：《Chinese Physics B》 (中国物理B（英文版）)

年 卷 期：2010年第19卷第8期

页      面：18-23页

核心收录：

学科分类：080801[工学-电机与电器] 0808[工学-电气工程] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 0704[理学-天文学] 

基　　金：Project supported by the National Basic Research Program of China(Grant Nos.2006CB921107 and 2010CB630704) the National Natural Science Foundation of China(Grant No.10774165) 

主　　题：superconducting materials surface phase transitions and critical phenomena superconducting films x-ray determination of structures 

摘      要：We find that the superconductivity in the thin films of the formerly believed non-superconducting parent compound FeTe is accompanied by an emergence of second order with a correlation length of 742 nm and 258 nm at 10 K and 300 K, respectively. The structural phase transition found in iron pnictide superconductors, in non-superconducting FeTe bulk samples, and in FeSe superconducting thin films is not observed in the superconducting FeTe thin films. The interplay between superconductivity and long range order may suggest the crucial role of competition between electronic localization and itinerancy which leads to strong quantum fluctuations in the FeTe system.