Strong Electron Correlations in the Normal State of the Iron-Based FeSe0.42Te0.58 Superconductor Observed by Angle-Resolved Photoemission Spectroscopy

被引：179

作者：

Tamai, A. ^{[1
]}

Ganin, A. Y. ^{[2
]}

Rozbicki, E. ^{[1
]}

Bacsa, J. ^{[2
]}

Meevasana, W. ^{[1
]}

King, P. D. C. ^{[1
]}

Caffio, M. ^{[3
]}

Schaub, R. ^{[3
]}

Margadonna, S. ^{[4
]}

Prassides, K. ^{[5
]}

Rosseinsky, M. J. ^{[2
]}

Baumberger, F. ^{[1
]}

机构：

[1] Univ St Andrews, Sch Phys & Astron, St Andrews KY16 9SS, Fife, Scotland

[2] Univ Liverpool, Dept Chem, Liverpool L69 7ZD, Merseyside, England

[3] Univ St Andrews, Sch Chem, St Andrews KY16 9ST, Fife, Scotland

[4] Univ Edinburgh, Sch Chem, Edinburgh EH9 3JJ, Midlothian, Scotland

[5] Univ Durham, Dept Chem, Durham DH1 3LE, England

来源：

PHYSICAL REVIEW LETTERS | 2010年 / 104卷 / 09期

基金：

英国工程与自然科学研究理事会; 欧洲研究理事会;

关键词：

PNICTIDES;

D O I：

10.1103/PhysRevLett.104.097002

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We investigate the normal state of the "11'' iron-based superconductor FeSe0.42Te0.58 by angle-resolved photoemission. Our data reveal a highly renormalized quasiparticle dispersion characteristic of a strongly correlated metal. We find sheet dependent effective carrier masses between approximate to 3 and 16m(e) corresponding to a mass enhancement over band structure values of m*/m(band) approximate to 6-20. This is nearly an order of magnitude higher than the renormalization reported previously for iron-arsenide superconductors of the "1111'' and "122'' families but fully consistent with the bulk specific heat.

引用

页数：4

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