CAS OpenIR  > 中科院上海应用物理研究所2011-2019年
Role of the 245 phase in alkaline iron selenide superconductors revealed by high-pressure studies
Gao, PW; Yu, R; Sun, LL; Wang, HD; Wang, Z; Wu, Q; Fang, MH; Chen, GF; Guo, J; Zhang, C; Gu, DC; Tian, HF; Li, JQ; Liu, J; Li, YC; Li, XD; Jiang, S; Yang, K; Li, AG; Si, QM; Zhao, ZX; llsun@iphy.ac.cn; zhxzhao@iphy.ac.cn
2014
Source PublicationPHYSICAL REVIEW B
ISSN1098-0121
Volume89Issue:9
AbstractThere is considerable interest in uncovering the physics of iron-based superconductivity from the alkaline iron selenides, a materials class containing an insulating phase (245 phase) and a superconducting (SC) phase. Due to the microstructural complexity of these superconductors, the role of the 245 phase in the development of the superconductivity has been a puzzle. Here we demonstrate a comprehensive high-pressure study on the insulating samples with pure 245 phase and biphasic SC samples. We find that the insulating behavior can be completely suppressed by pressure in the insulating samples and also identify an intermediate metallic (M similar to) state. The Mott insulating (MI) state of the 245 phase and the M' state coexist over a significant range of pressure up to similar to 10 GPa, the same pressure at which the superconductivity of the SC samples vanishes. Our results reveal the M' state as a pathway that connects the insulating and SC phases of the alkaline iron selenides and indicate that the coexistence and interplay between the MI and M' states is a necessary condition for superconductivity. Finally, we interpret the M' state in terms of an orbital selectivity of the correlated 3d electrons.
KeywordInsulator Chalcogenides Pnictides
Indexed BySCI
Language英语
WOS IDWOS:000332704400003
Citation statistics
Cited Times:27[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.sinap.ac.cn/handle/331007/14367
Collection中科院上海应用物理研究所2011-2019年
Corresponding Authorllsun@iphy.ac.cn; zhxzhao@iphy.ac.cn
Recommended Citation
GB/T 7714
Gao, PW,Yu, R,Sun, LL,et al. Role of the 245 phase in alkaline iron selenide superconductors revealed by high-pressure studies[J]. PHYSICAL REVIEW B,2014,89(9).
APA Gao, PW.,Yu, R.,Sun, LL.,Wang, HD.,Wang, Z.,...&zhxzhao@iphy.ac.cn.(2014).Role of the 245 phase in alkaline iron selenide superconductors revealed by high-pressure studies.PHYSICAL REVIEW B,89(9).
MLA Gao, PW,et al."Role of the 245 phase in alkaline iron selenide superconductors revealed by high-pressure studies".PHYSICAL REVIEW B 89.9(2014).
Files in This Item: Download All
File Name/Size DocType Version Access License
Role of the 245 phas(2175KB) 开放获取CC BY-NC-SAView Download
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Gao, PW]'s Articles
[Yu, R]'s Articles
[Sun, LL]'s Articles
Baidu academic
Similar articles in Baidu academic
[Gao, PW]'s Articles
[Yu, R]'s Articles
[Sun, LL]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Gao, PW]'s Articles
[Yu, R]'s Articles
[Sun, LL]'s Articles
Terms of Use
No data!
Social Bookmark/Share
File name: Role of the 245 phase in alkaline iron selenide superconductors revealed by high-pressure studies.pdf
Format: Adobe PDF
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.