Anisotropy, Itineracy, and Magnetic Frustration in High-TC Iron Pnictides

被引：113

作者：

Han, Myung Joon ^{[1
]}

Yin, Quan ^{[1
]}

Pickett, Warren E. ^{[1
]}

Savrasov, Sergey Y. ^{[1
]}

机构：

[1] Univ Calif Davis, Dept Phys, Davis, CA 95616 USA

来源：

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

关键词：

MEAN-FIELD THEORY; ELECTRONIC-STRUCTURE; SUPERCONDUCTIVITY; DYNAMICS;

D O I：

10.1103/PhysRevLett.102.107003

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Using first-principles density functional theory calculations combined with insight from a tight-binding representation, dynamical mean field theory, and linear response theory, we have extensively investigated the electronic structures and magnetic interactions of nine ferropnictides representing three different structural classes. The calculated magnetic interactions are found to be short range, and the nearest (J(1a)) and next-nearest (J(2)) exchange constants follow the universal trend of J(1a)/2J(2)similar to 1, despite their itinerant origin and extreme sensitivity to the z position of As. These results bear on the discussion of itineracy versus magnetic frustration as the key factor in stabilizing the superconducting ground state. The calculated spin-wave dispersions show strong magnetic anisotropy in the Fe plane, in contrast with cuprates.

引用

收藏

页数：4

相关论文

共 46 条

[1]

BAO W, ARXIV8092058

[2] Is LaFeAsO1-xFx an electron-phonon superconductor? [J].

Boeri, L. ;

Dolgov, O. V. ;

Golubov, A. A. .

PHYSICAL REVIEW LETTERS, 2008, 101 (02)

[3] Exchange interaction parameters and adiabatic spin-wave spectra of ferromagnets:: A "renormalized magnetic force theorem" -: art. no. 087205 [J].

Bruno, P .

PHYSICAL REVIEW LETTERS, 2003, 90 (08) :4

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

Cao, Chao ;

Hirschfeld, P. J. ;

Cheng, Hai-Ping .

PHYSICAL REVIEW B, 2008, 77 (22)

[5] Superconductivity at 43 K in SmFeAsO1-xFx [J].

Chen, X. H. ;

Wu, T. ;

Wu, G. ;

Liu, R. H. ;

Chen, H. ;

Fang, D. F. .

NATURE, 2008, 453 (7196) :761-762

[6] Magnetism, superconductivity, and pairing symmetry in iron-based superconductors [J].

Chubukov, A. V. ;

Efremov, D. V. ;

Eremin, I. .

PHYSICAL REVIEW B, 2008, 78 (13)

[7] Coexistence of magnetic fluctuations and superconductivity in the pnictide high temperature superconductor SmFeAsO1-xFx measured by muon spin rotation [J].

Drew, A. J. ;

Pratt, F. L. ;

Lancaster, T. ;

Blundell, S. J. ;

Baker, P. J. ;

Liu, R. H. ;

Wu, G. ;

Chen, X. H. ;

Watanabe, I. ;

Malik, V. K. ;

Dubroka, A. ;

Kim, K. W. ;

Roessle, M. ;

Bernhard, C. .

PHYSICAL REVIEW LETTERS, 2008, 101 (09)

[8] High-energy spin excitations in BaFe2As2 observed by inelastic neutron scattering [J].

Ewings, R. A. ;

Perring, T. G. ;

Bewley, R. I. ;

Guidi, T. ;

Pitcher, M. J. ;

Parker, D. R. ;

Clarke, S. J. ;

Boothroyd, A. T. .

PHYSICAL REVIEW B, 2008, 78 (22)

[9] Theory of electron nematic order in LaFeAsO [J].

Fang, Chen ;

Yao, Hong ;

Tsai, Wei-Feng ;

Hu, JiangPing ;

Kivelson, Steven A. .

PHYSICAL REVIEW B, 2008, 77 (22)

[10] Superconductivity close to magnetic instability in Fe(Se1-xTex)0.82 [J].

Fang, M. H. ;

Pham, H. M. ;

Qian, B. ;

Liu, T. J. ;

Vehstedt, E. K. ;

Liu, Y. ;

Spinu, L. ;

Mao, Z. Q. .

PHYSICAL REVIEW B, 2008, 78 (22)

← 1 2 3 4 5 →