Self-hole-doping-induced superconductivity in KCa2Fe4As4F2

被引：34

作者：

Wang, Guangtao ^{[1
]}

Wang, Zhenwei ^{[1
]}

Shi, Xianbiao ^{[1
]}

机构：

[1] Henan Normal Univ, Coll Phys & Informat Engn, Xinxiang 453007, Henan, Peoples R China

来源：

EPL | 2016年 / 116卷 / 03期

关键词：

ELECTRONIC-STRUCTURE; FE2AS2; LAYERS; FERROMAGNETISM;

D O I：

10.1209/0295-5075/116/37003

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The electronic structure, magnetism, Fermi surface nesting, and bare susceptibility of the superconductor KCa2Fe4As4F2 are discussed in relation to the Fe-pnictide superconductors based on the first-principle calculations. There are ten bands crossing the Fermi level in the nonmagnetic (NM) states, resulting in six hole-like Fermi surface (FS) sheets along the Gamma-Z line and four electron-like FS sheets along the X-P line. It is more complicated than other FeAs-based superconductors, showing multi-bands character. Fixed spin moment calculations and the total energies of different magnetic phase indicate that KCa2Fe4As4F2 has a strong tendency towards magnetism, i.e., the stripe antiferromagnetic state. But the self-hole-doping suppressed the spin-density wave state, and then induced superconductivity in the parent compound. Such self-doping strategy may be used for future exploration of new superconductors. Copyright (C) EPLA, 2016

引用

页数：6

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