Unusual Electronic Structure and Observation of Dispersion Kink in CeFeAsO Parent Compound of FeAs-based Superconductors

被引：26

作者：

Liu, Haiyun ^{[1
]}

Chen, G. F. ^{[2
]}

Zhang, Wentao ^{[1
]}

Zhao, Lin ^{[1
]}

Liu, Guodong ^{[1
]}

Xia, T. -L. ^{[2
]}

Jia, Xiaowen ^{[1
]}

Mu, Daixiang ^{[1
]}

Liu, Shanyu ^{[1
]}

He, Shaolong ^{[1
]}

Peng, Yingying ^{[1
]}

He, Junfeng ^{[1
]}

Chen, Zhaoyu ^{[1
]}

Dong, Xiaoli ^{[1
]}

Zhang, Jun ^{[1
]}

Wang, Guiling ^{[3
]}

Zhu, Yong ^{[3
]}

Xu, Zuyan ^{[3
]}

Chen, Chuangtian ^{[3
]}

Zhou, X. J. ^{[1
]}

机构：

[1] Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter Phys, Natl Lab Superconduct, Beijing 100190, Peoples R China

[2] Renmin Univ China, Dept Phys, Beijing 100872, Peoples R China

[3] Chinese Acad Sci, Tech Inst Phys & Chem, Beijing 100190, Peoples R China

来源：

PHYSICAL REVIEW LETTERS | 2010年 / 105卷 / 02期

关键词：

IRON; ORDER;

D O I：

10.1103/PhysRevLett.105.027001

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report the first comprehensive high-resolution angle-resolved photoemission measurements on CeFeAsO, a parent compound of FeAs-based high temperature superconductors with a magnetic-structural transition at similar to 150 K. In the magnetic-ordering state, four holelike Fermi surface sheets are observed near Gamma(0,0),and the Fermi surface near M(+/-pi, +/-pi) shows a tiny electronlike pocket at M surrounded by four strong spots. The unusual Fermi surface topology deviates strongly from the band structure calculations. The electronic signature of the magnetic-structural transition shows up in the dramatic change of the quasiparticle scattering rate. A dispersion kink at similar to 25 meV is observed for the first time in the parent compound of Fe-based superconductors.

引用

页数：4

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