Doping evolution of antiferromagnetic order and structural distortion in LaFeAsO1-xFx

被引：90

作者：

Huang, Q. ^{[1
]}

Zhao, Jun ^{[4
]}

Lynn, J. W. ^{[1
]}

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

Luo, J. L. ^{[2
]}

Wang, N. L. ^{[2
]}

Dai, Pengcheng ^{[3
,4
]}

机构：

[1] Natl Inst Stand & Technol, NIST Ctr Neutron Res, Gaithersburg, MD 20899 USA

[2] Chinese Acad Sci, Beijing Natl Lab Condensed Matter Phys, Inst Phys, Beijing 100080, Peoples R China

[3] Oak Ridge Natl Lab, Neutron Scattering Sci Div, Oak Ridge, TN 37831 USA

[4] Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA

来源：

PHYSICAL REVIEW B | 2008年 / 78卷 / 05期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1103/PhysRevB.78.054529

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We use neutron scattering to study the structural distortion and antiferromagnetic (AFM) order in LaFeAsO1-xFx as the system is doped with fluorine (F) to induce superconductivity. In the undoped state, LaFeAsO exhibits a structural distortion, changing the symmetry from tetragonal (space group P4/nmm) to orthorhombic (space group Cmma) at 155 K, and then followed by an AFM order at 137 K. Doping the system with F gradually decreases the structural distortion temperature, but suppresses the long range AFM order before the emergence of superconductivity. Therefore, while superconductivity in these Fe oxypnictides can survive in either the tetragonal or the orthorhombic crystal structure, it competes directly with static AFM order.

引用

页数：6

共 22 条

[1] [Anonymous], ARXIV08063878
[2] CARLO P, ARXIV08052186
[3] Superconducting properties of the Fe-based layered superconductor LaFeAsO0.9F0.1-δ
Chen, G. F.
Li, Z.
Li, G.
Zhou, J.
Wu, D.
Dong, J.
Hu, W. Z.
Zheng, P.
Chen, Z. J.
Yuan, H. Q.
Singleton, J.
Luo, J. L.
Wang, N. L.
[J]. PHYSICAL REVIEW LETTERS, 2008, 101 (05)
[4] Superconductivity at 41 K and its competition with spin-density-wave instability in layered CeO1-xFxFeAs
Chen, G. F.
Li, Z.
Wu, D.
Li, G.
Hu, W. Z.
Dong, J.
Zheng, P.
Luo, J. L.
Wang, N. L.
[J]. PHYSICAL REVIEW LETTERS, 2008, 100 (24)
[5] Superconductivity at 43 K in SmFeAsO1-xFx
Chen, X. H.
Wu, T.
Wu, G.
Liu, R. H.
Chen, H.
Fang, D. F.
[J]. NATURE, 2008, 453 (7196) : 761 - 762
[6] Magnetic order of the iron spins in NdFeAsO
Chen, Ying
Lynn, J. W.
Li, J.
Li, G.
Chen, G. F.
Luo, J. L.
Wang, N. L.
Dai, Pengcheng
dela Cruz, C.
Mook, H. A.
[J]. PHYSICAL REVIEW B, 2008, 78 (06)
[7] Magnetic order close to superconductivity in the iron-based layered LaO1-xFxFeAs systems
de la Cruz, Clarina
Huang, Q.
Lynn, J. W.
Li, Jiying
Ratcliff, W., II
Zarestky, J. L.
Mook, H. A.
Chen, G. F.
Luo, J. L.
Wang, N. L.
Dai, Pengcheng
[J]. NATURE, 2008, 453 (7197) : 899 - 902
[8] Theory of electron nematic order in LaFeAsO
Fang, Chen
Yao, Hong
Tsai, Wei-Feng
Hu, JiangPing
Kivelson, Steven A.
[J]. PHYSICAL REVIEW B, 2008, 77 (22):
[9] GOLDMAN AI, ARXIV08071525
[10] HUANG Q, ARXIV08062776

← 1 2 3 →