Electronic structure of optimally doped pnictide Ba0.6K0.4Fe2As2: a comprehensive angle-resolved photoemission spectroscopy investigation

被引：97

作者：

Ding, H. ^{[1
,7
]}

Nakayama, K. ^{[2
]}

Richard, P. ^{[1
,3
,7
]}

Souma, S. ^{[3
]}

Sato, T. ^{[2
,4
]}

Takahashi, T. ^{[2
,3
]}

Neupane, M. ^{[5
]}

Xu, Y-M ^{[5
,6
]}

Pan, Z-H ^{[8
]}

Fedorov, A. V. ^{[10
]}

Wang, Z. ^{[5
]}

Dai, X. ^{[1
,7
]}

Fang, Z. ^{[1
,7
]}

Chen, G. F. ^{[9
]}

Luo, J. L. ^{[1
,7
]}

Wang, N. L. ^{[1
,7
]}

机构：

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

[2] Tohoku Univ, Dept Phys, Sendai, Miyagi 9808578, Japan

[3] Tohoku Univ, WPI Res Ctr, Adv Inst Mat Res, Sendai, Miyagi 9808577, Japan

[4] Japan Sci & Technol Agcy JST, TRIP, Kawaguchi, Saitama 3320012, Japan

[5] Boston Coll, Dept Phys, Chestnut Hill, MA 02467 USA

[6] Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA

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

[8] Brookhaven Natl Lab, Condensed Matter Phys & Mat Sci Dept, Upton, NY 11973 USA

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

[10] Univ Calif Berkeley, Lawrence Berkeley Lab, Adv Light Source, Berkeley, CA 94720 USA

来源：

JOURNAL OF PHYSICS-CONDENSED MATTER | 2011年 / 23卷 / 13期

基金：

美国国家科学基金会;

关键词：

NODELESS SUPERCONDUCTING GAPS; ORDER;

D O I：

10.1088/0953-8984/23/13/135701

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

The electronic structure of the Fe-based superconductor Ba0.6K0.4Fe2As2 is studied by means of angle-resolved photoemission. We identify dispersive bands crossing the Fermi level forming hole-like (electron-like) Fermi surfaces (FSs) around Gamma(M) with nearly nested FS pockets connected by the antiferromagnetic wavevector. Compared to band structure calculation findings, the overall bandwidth is reduced by a factor of 2 and the low energy dispersions display even stronger mass renormalization. Using an effective tight banding model, we fitted the band structure and the FSs to obtain band parameters reliable for theoretical modeling and calculation of physical quantities.

引用

页数：6

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