Observation of lateral long range order in superconducting FeTe thin films

doi:10.1088/1674-1056/19/8/087403

中国物理B ›› 2010, Vol. 19 ›› Issue (8): 87403-087403.doi: 10.1088/1674-1056/19/8/087403

Observation of lateral long range order in superconducting FeTe thin films

王焕华¹, 贾全杰¹, 陈雨¹, 姜晓明¹, 李位勇², 韩烨², 曹立新², 董成², 许波², 赵柏儒²

(1)Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China; (2)National Laboratory for Superconductivity, Institute of Physics and Beijing National Laboratory for Condensed Matter Physics, Chinese Academy of Sciences, Beijing 100190, China

收稿日期:2010-05-12 修回日期:2010-05-19 出版日期:2010-08-15 发布日期:2010-08-15
基金资助:
Project supported by the National Basic Research Program of China (Grant Nos. 2006CB921107 and 2010CB630704) and the National Natural Science Foundation of China (Grant No. 10774165).

Observation of lateral long range order in superconducting FeTe thin films

Li Wei-Yong (李位勇)^a, Han Ye (韩烨)^a, Wang Huan-Hua (王焕华)^b, Cao Li-Xin (曹立新)^a, Jia Quan-Jie (贾全杰)^b, Chen Yu (陈雨)^b, Jiang Xiao-Ming (姜晓明)^b, Dong Cheng (董成)^a, Xu Bo (许波)^a, Zhao Bai-Ru (赵柏儒)^a

^a National Laboratory for Superconductivity, Institute of Physics and Beijing National Laboratory for Condensed Matter Physics, Chinese Academy of Sciences, Beijing 100190, China; ^b Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China

Received:2010-05-12 Revised:2010-05-19 Online:2010-08-15 Published:2010-08-15
Supported by:
Project supported by the National Basic Research Program of China (Grant Nos. 2006CB921107 and 2010CB630704) and the National Natural Science Foundation of China (Grant No. 10774165).

摘要/Abstract

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.

Abstract: 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.

Key words: superconducting materials, surface phase transitions and critical phenomena, superconducting films, x-ray determination of structures

中图分类号: (Superconducting films and low-dimensional structures)

74.78.-w

74.25.Jb (Electronic structure (photoemission, etc.))

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. Observation of lateral long range order in superconducting FeTe thin films[J]. 中国物理B, 2010, 19(8): 87403-087403.

Li Wei-Yong (李位勇), Han Ye (韩烨), Wang Huan-Hua (王焕华), Cao Li-Xin (曹立新), Jia Quan-Jie (贾全杰), Chen Yu (陈雨), Jiang Xiao-Ming (姜晓明), Dong Cheng (董成), Xu Bo (许波), Zhao Bai-Ru (赵柏儒). Observation of lateral long range order in superconducting FeTe thin films[J]. Chin. Phys. B, 2010, 19(8): 87403-087403.

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Observation of lateral long range order in superconducting FeTe thin films

Observation of lateral long range order in superconducting FeTe thin films

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