Unique crystal field splitting and multiband RKKY interactions in Ni-doped EuRbFe4As4

被引：20

作者：

Xu, Chenchao ^{[1
]}

Chen, Qijin ^{[1
]}

Cao, Chao ^{[2
]}

机构：

[1] Zhejiang Univ, Dept Phys, Hangzhou 310027, Zhejiang, Peoples R China

[2] Hangzhou Normal Univ, Dept Phys, Condensed Matter Grp, Hangzhou 311121, Zhejiang, Peoples R China

来源：

COMMUNICATIONS PHYSICS | 2019年 / 2卷 / 1期

关键词：

D O I：

10.1038/s42005-019-0112-1

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The relationship between magnetism and superconductivity has been one of the most discussed topics in iron-based superconductors. Using first-principles calculations, we have studied the electronic structure of 1144-type iron-based superconductor EuRbFe4As4. We find the crystal field splitting of EuRbFe4As4 is unique, such that the d(z2) orbitals are closer to the Fermi level epsilon(F) than the d(xy) orbitals. The Ruderman-Kittel-Kasuya-Yosida (RKKY) interaction strength is approximately 0.12 meV in pristine EuRbFe4As4. Upon Ni-doping on the Fe site, the RKKY interaction strength is barely changed upon Ni-doping due to the highly anisotropic Fermi surfaces and multiband effect, despite the drastically reduced d(zx(y)) density of state at epsilon(F). Finally, in both pristine and doped compounds, the RKKY interaction is primarily mediated through bands due to Fe-d(z2) orbitals. Our calculations suggest the RKKY interaction mediated by d(z2) orbital is probably responsible for the magnetism in EuRbFe4As4 and doesn't change upon Ni-doping.

引用

页数：7

共 40 条

[31]

Perdew JP, 1996, PHYS REV LETT, V77, P3865, DOI 10.1103/PhysRevLett.77.3865

[32] Suppression of spin-density-wave transition and emergence of ferromagnetic ordering of Eu2+ moments in EuFe2-xNixAs2 [J].

Ren, Zhi ;

Lin, Xiao ;

Tao, Qian ;

Jiang, Shuai ;

Zhu, Zengwei ;

Wang, Cao ;

Cao, Guanghan ;

Xu, Zhu'an .

PHYSICAL REVIEW B, 2009, 79 (09)

[33] RELATION BETWEEN ANDERSON AND KONDO HAMILTONIANS [J].

SCHRIEFFER, JR ;

WOLFF, PA .

PHYSICAL REVIEW, 1966, 149 (02) :491-+

[34] Electronic Structure and Magnetism of the Multiband New Superconductor CaRbFe4As4 [J].

Shi, Xianbiao ;

Wang, Guangtao .

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 2016, 85 (12)

[35] Density functional study of LaFeAsO1-xFx:: A low carrier density superconductor near itinerant magnetism [J].

Singh, D. J. ;

Du, M. -H. .

PHYSICAL REVIEW LETTERS, 2008, 100 (23)

[36] Superconductivity in iron compounds [J].

Stewart, G. R. .

REVIEWS OF MODERN PHYSICS, 2011, 83 (04) :1589-1652

[37] Effect of pressure on the Raman modes of antimony [J].

Wang, X. ;

Kunc, K. ;

Loa, I. ;

Schwarz, U. ;

Syassen, K. .

PHYSICAL REVIEW B, 2006, 74 (13)

[38] Effects of magnetic ordering on dynamical conductivity: Optical investigations of EuFe2As2 single crystals [J].

Wu, D. ;

Barisic, N. ;

Drichko, N. ;

Kaiser, S. ;

Faridian, A. ;

Dressel, M. ;

Jiang, S. ;

Ren, Z. ;

Li, L. J. ;

Cao, G. H. ;

Xu, Z. A. ;

Jeevan, H. S. ;

Gegenwart, P. .

PHYSICAL REVIEW B, 2009, 79 (15)

[39] Enhanced Antiferromagnetic Exchange between Magnetic Impurities in a Superconducting Host [J].

Yao, N. Y. ;

Glazman, L. I. ;

Demler, E. A. ;

Lukin, M. D. ;

Sau, J. D. .

PHYSICAL REVIEW LETTERS, 2014, 113 (08)

[40] Orbital characters of bands in the iron-based superconductor BaFe1.85Co0.15As2 [J].

Zhang, Y. ;

Chen, F. ;

He, C. ;

Zhou, B. ;

Xie, B. P. ;

Fang, C. ;

Tsai, W. F. ;

Chen, X. H. ;

Hayashi, H. ;

Jiang, J. ;

Iwasawa, H. ;

Shimada, K. ;

Namatame, H. ;

Taniguchi, M. ;

Hu, J. P. ;

Feng, D. L. .

PHYSICAL REVIEW B, 2011, 83 (05)

← 1 2 3 4 →