Electronic Structure and Unusual Exchange Splitting in the Spin-Density-Wave State of the BaFe2As2 Parent Compound of Iron-Based Superconductors

被引：142

作者：

Yang, L. X. ^{[1
,7
]}

Zhang, Y. ^{[1
,7
]}

Ou, H. W. ^{[1
,7
]}

Zhao, J. F. ^{[1
,7
]}

Shen, D. W. ^{[1
,7
]}

Zhou, B. ^{[1
,7
]}

Wei, J. ^{[1
,7
]}

Chen, F. ^{[1
,7
]}

Xu, M. ^{[1
,7
]}

He, C. ^{[1
,7
]}

Chen, Y. ^{[1
,7
]}

Wang, Z. D. ^{[1
,2
,7
]}

Wang, X. F. ^{[3
,8
]}

Wu, T. ^{[3
,8
]}

Wu, G. ^{[3
,8
]}

Chen, X. H. ^{[3
,8
]}

Arita, M. ^{[4
,9
]}

Shimada, K. ^{[4
,9
]}

Taniguchi, M. ^{[4
,9
]}

Lu, Z. Y. ^{[5
]}

Xiang, T. ^{[6
]}

Feng, D. L. ^{[1
,7
]}

机构：

[1] Fudan Univ, Dept Phys, Surface Phys Lab, Natl Key Lab, Shanghai 200433, Peoples R China

[2] Univ Hong Kong, Dept Phys, Hong Kong, Peoples R China

[3] Univ Sci & Technol China, Hefei Natl Lab Phys Sci Microscale, Anhua 230026, Peoples R China

[4] Hiroshima Univ, Grad Sch Sci, Hiroshima 7398526, Japan

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

[6] Chinese Acad Sci, Inst Phys, Beijing 100190, Peoples R China

[7] Fudan Univ, Adv Mat Lab, Shanghai 200433, Peoples R China

[8] Univ Sci & Technol China, Dept Phys, Anhua 230026, Peoples R China

[9] Hiroshima Univ, Hiroshima Synchrotron Radiat Ctr, Hiroshima 7398526, Japan

来源：

PHYSICAL REVIEW LETTERS | 2009年 / 102卷 / 10期

关键词：

LAYERED QUATERNARY COMPOUND; FEAS;

D O I：

10.1103/PhysRevLett.102.107002

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The magnetic properties in the parent compounds are often intimately related to the microscopic mechanism of superconductivity. Here we report the first direct measurements on the electronic structure of a parent compound of the newly discovered iron-based superconductor, BaFe2As2, which provides a foundation for further studies. We show that the energy of the spin density wave in BaFe2As2 is mainly lowered through exotic exchange splitting of the band structure.

引用

页数：4

共 26 条

[1] Proximity of antiferromagnetism and superconductivity in LaFeAsO1-xFx:: Effective Hamiltonian from ab initio studies [J].