Normal-state correlated electronic structure of iron pnictides from first principles

被引：69

作者：

Craco, L. ^{[1
]}

Laad, M. S. ^{[2
]}

Leoni, S. ^{[1
]}

Rosner, H. ^{[1
]}

机构：

[1] Max Planck Inst Chem Phys Fester Stoffe, D-01187 Dresden, Germany

[2] Max Planck Inst Phys Komplexer Syst, D-01187 Dresden, Germany

来源：

PHYSICAL REVIEW B | 2008年 / 78卷 / 13期

关键词：

D O I：

10.1103/PhysRevB.78.134511

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We describe the correlated electronic structure of a prototype Fe-pnictide superconductor, SmO1-xFxFeAs, using local-density approximation plus dynamical mean-field theory. Strong, multiorbital electronic correlations generate a low-energy pseudogap in the undistorted phase, giving a bad, incoherent metal in qualitative agreement with observations. Very good semiquantitative agreement with the experimental spectral functions is seen (for U=4.0 eV and J(H)=0.7 eV) and interpreted within a correlated, multiorbital picture. Our results show that Fe pnictides should be understood as low-carrier density, incoherent metals, in resemblance to the underdoped cuprate superconductors.

引用

页数：7

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