Correlated band structure of superconducting NdFeAsO0.9F0.1: Dynamical mean-field study

被引：1
|
作者：
Skornyakov, S. L. [1 ,2 ]
Shein, I. R. [3 ]
Ivanovskii, A. L. [3 ]
Anisimov, V. I. [1 ,2 ]
机构：
[1] Russian Acad Sci, Inst Met Phys, Ural Branch, Ekaterinburg 620990, Russia
[2] Ural Fed Univ, Ekaterinburg 620002, Russia
[3] Russian Acad Sci, Inst Solid State Chem, Ural Branch, Ekaterinburg 620990, Russia
来源：
JETP LETTERS | 2013年 / 98卷 / 07期
基金：
俄罗斯基础研究基金会;
关键词：
HIGH-TEMPERATURE SUPERCONDUCTORS; DENSITY-FUNCTIONAL CALCULATION; ELECTRONIC-STRUCTURE; LAYERED SUPERCONDUCTOR; IRON; SYSTEMS;
D O I：
10.1134/S0021364013200137
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We report the LDA + DMFT (method combining local density approximation with dynamical mean-field theory) results for spectral properties of the superconductor NdFeAsO0.9F0.1 in the paramagnetic phase. The calculated momentum-resolved spectral functions are in good agreement with angle-resolved photoemission spectra (ARPES). The obtained effective quasiparticle mass enhancement (m*/m = 1.4) is smaller than the one in isostructural parent compound LaFeAsO which critical temperature under the same fluorine doping (LaFeAsO0.9F0.1) is two times lower. Our results demonstrate that in quaternary FeAs-based superconductors of the same class, changes of the crystal structure caused by substitution of one rare-earth atom, implicitly result in reduction of the electronic correlation strength.
引用
收藏
页码：373 / 377
页数：5
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