Evolution of superconductivity and antiferromagnetic order in Ba(Fe0.92-xCo0.08Vx)2As2

被引：2

作者：

Sheng, Jieming ^{[1
,2
,3
,4
,5
]}

Li, Xingguang ^{[1
,2
]}

Tian, Congkuan ^{[1
,2
]}

Song, Jianming ^{[6
,7
]}

Li, Xin ^{[6
,7
]}

Sun, Guangai ^{[6
,7
]}

Xia, Tianlong ^{[1
,2
]}

Wang, Jinchen ^{[1
,2
]}

Liu, Juanjuan ^{[1
,2
]}

Xu, Daye ^{[1
,2
]}

Zhang, Hongxia ^{[1
,2
]}

Tong, Xin ^{[3
,4
]}

Luo, Wei ^{[3
,4
]}

Wu, Liusuo ^{[5
]}

Bao, Wei ^{[1
,2
,8
]}

Cheng, Peng ^{[1
,2
]}

机构：

[1] Renmin Univ China, Dept Phys, Beijing 100872, Peoples R China

[2] Renmin Univ China, Beijing Key Lab Optoelect Funct Mat & Micronano D, Beijing 100872, Peoples R China

[3] Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China

[4] Spallat Neutron Source Sci Ctr, Dongguan 523803, Peoples R China

[5] Southern Univ Sci & Technol, Dept Phys, Shenzhen 518055, Peoples R China

[6] China Acad Engn Phys, Key Lab Neutron Phys, Mianyang 621999, Sichuan, Peoples R China

[7] China Acad Engn Phys, Inst Nucl Phys & Chem, Mianyang 621999, Sichuan, Peoples R China

[8] City Univ Hong Kong, Dept Phys, Kowloon, Hong Kong, Peoples R China

来源：

PHYSICAL REVIEW B | 2020年 / 101卷 / 17期

基金：

中国国家自然科学基金;

关键词：

D O I：

10.1103/PhysRevB.101.174516

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The vanadium doping effects on the superconductivity and magnetism of iron pnictides are investigated in Ba(Fe0.92-xCo0.08Vx)(2)As-2 by transport, susceptibility, and neutron scattering measurements. The doping of magnetic impurity V causes a fast suppression of superconductivity with T-C reduced at a rate of approximately 7.4 K/1% V. On the other hand, for x >= 0.02, long-range C-type antiferromagnetic order is recovered upon V doping, in contrast to the x = 0 sample with no detectable magnetic order. The value of ordered magnetic moments of Ba(Fe0.92-xCo0.08Vx)(2)A(s)2 follows a domelike evolution versus doping concentration x. A possible Griffiths-type antiferromagnetic region of multiple coexisting phases in the phase diagram of Ba(Fe0.92-xCo0.08Vx)(2)As-2 is identified, in accordance with previous theoretical predictions based on the cooperative behavior of magnetic impurities and conduction electrons mediating the Ruderman-Kittel-Kasuya-Yosida interactions between them.

引用

页数：6

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