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Coexistence of Polaronic States and Superconductivity in Iron-Pnictide Compound Ba2Ti2Fe2As4O
Rong, LY; Shi, X; Richard, P; Sun, YL; Cao, GH; Zhang, XZ; Ma, JZ; Shi, M; Huang, YB; Qian, T; Ding, H; Tai, RZ
2018
Source PublicationCHINESE PHYSICS LETTERS
ISSN0256-307X
Volume35Issue:5Pages:-
Subtype期刊论文
AbstractThe electronic structure of iron-pnictide compound superconductor Ba2Ti2Fe2As4O, which has metallic intermediate Ti2O layers, is studied using angle-resolved photoemission spectroscopy. The Ti-related bands show a 'peak-dip-hump' line shape with two branches of dispersion associated with the polaronic states at temperatures below around 120 K. This change in the spectra occurs along with the resistivity anomaly that was not clearly understood in a previous study. Moreover, an energy gap induced by the superconducting proximity effect opens in the polaronic bands at temperatures below T-c (similar to 21 K). Our study provides the spectroscopic evidence that superconductivity coexists with polarons in the same bands near the Fermi level, which provides a suitable platform to study interactions between charge, lattice and spin freedoms in a correlated system.
KeywordElectron Liquid Density-wave Fese Films Thin-films Na(2)Ti(2)Pn(2)o Oxides Pn Sb
DOI10.1088/0256-307X/35/5/057401
Indexed BySCI
Language英语
WOS IDWOS:000432916300027
Citation statistics
Document Type期刊论文
Identifierhttp://ir.sinap.ac.cn/handle/331007/28942
Collection中科院上海应用物理研究所2011-2018年
Affiliation1.Rong, LY
2.Shi, X
3.Richard, P
4.Sun, YL
5.Cao, GH
6.Zhang, XZ
7.Ma, JZ
8.Shi, M
9.Huang, YB
10.Qian, T
11.Ding, H
12.Tai, RZ
Recommended Citation
GB/T 7714
Rong, LY,Shi, X,Richard, P,et al. Coexistence of Polaronic States and Superconductivity in Iron-Pnictide Compound Ba2Ti2Fe2As4O[J]. CHINESE PHYSICS LETTERS,2018,35(5):-.
APA Rong, LY.,Shi, X.,Richard, P.,Sun, YL.,Cao, GH.,...&Tai, RZ.(2018).Coexistence of Polaronic States and Superconductivity in Iron-Pnictide Compound Ba2Ti2Fe2As4O.CHINESE PHYSICS LETTERS,35(5),-.
MLA Rong, LY,et al."Coexistence of Polaronic States and Superconductivity in Iron-Pnictide Compound Ba2Ti2Fe2As4O".CHINESE PHYSICS LETTERS 35.5(2018):-.
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