Unconventional electronic reconstruction in undoped (Ba,Sr)Fe2As2 across the spin density wave transition

被引：127

作者：

Yi, M. ^{[1
,2
,3
]}

Lu, D. H. ^{[4
]}

Analytis, J. G. ^{[1
,2
,3
]}

Chu, J-H. ^{[1
,2
,3
]}

Mo, S-K. ^{[5
]}

He, R-H. ^{[1
,2
,3
]}

Hashimoto, M. ^{[5
]}

Moore, R. G. ^{[4
]}

Mazin, I. I. ^{[6
]}

Singh, D. J. ^{[7
]}

Hussain, Z. ^{[5
]}

Fisher, I. R. ^{[1
,2
,3
]}

Shen, Z-X. ^{[1
,2
,3
]}

机构：

[1] SLAC Natl Accelerator Lab, Stanford Inst Mat & Energy Sci, Menlo Pk, CA 94025 USA

[2] Stanford Univ, Dept Phys, Geballe Lab Adv Mat, Stanford, CA 94305 USA

[3] Stanford Univ, Dept Appl Phys, Geballe Lab Adv Mat, Stanford, CA 94305 USA

[4] SLAC Natl Accelerator Lab, Stanford Synchrotron Radiat Lightsource, Menlo Pk, CA 94025 USA

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

[6] USN, Res Lab, Ctr Computat Mat Sci, Washington, DC 20375 USA

[7] Oak Ridge Natl Lab, Div Mat Sci & Technol, Oak Ridge, TN 37831 USA

来源：

PHYSICAL REVIEW B | 2009年 / 80卷 / 17期

关键词：

band structure; barium compounds; density functional theory; high-temperature superconductors; iron compounds; magnetic moments; photoelectron spectra; spin density waves; strontium compounds; IRON-PNICTIDES; ORDER;

D O I：

10.1103/PhysRevB.80.174510

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Through a systematic high-resolution angle-resolved photoemission study of the iron pnictide compounds (Ba,Sr)Fe2As2, we show that the electronic structures of these compounds are significantly reconstructed across the spin density wave transition, which cannot be described by a simple folding scenario of conventional density wave ordering. Moreover, we find that LDA calculations with an incorporated suppressed magnetic moment of 0.5 mu(B) can match well the details in the reconstructed electronic structure, suggesting that the nature of magnetism in the pnictides is more itinerant than local, while the origin of suppressed magnetic moment remains an important issue for future investigations.

引用

页数：10

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