Flat-band magnetism and helical magnetic order in Ni-doped SrCo2As2

被引：15

作者：

Li, Yu ^{[1
,2
]}

Liu, Zhonghao ^{[3
,4
]}

Xu, Zhuang ^{[5
,6
]}

Song, Yu ^{[1
]}

Huang, Yaobo ^{[7
]}

Shen, Dawei ^{[3
,4
]}

Ma, Ni ^{[3
,4
]}

Li, Ang ^{[3
,4
]}

Chi, Songxue ^{[8
]}

Frontzek, Matthias ^{[8
]}

Cao, Huibo ^{[8
]}

Huang, Qingzhen ^{[9
]}

Wang, Weiyi ^{[1
]}

Xie, Yaofeng ^{[1
]}

Zhang, Rui ^{[1
]}

Rong, Yan ^{[5
,6
]}

Shelton, William A. ^{[10
]}

Young, David P. ^{[2
]}

DiTusa, J. F. ^{[2
]}

Dai, Pengcheng ^{[1
,5
,6
]}

机构：

[1] Rice Univ, Dept Phys & Astron, Houston, TX 77005 USA

[2] Louisiana State Univ, Dept Phys & Astron, Baton Rouge, LA 70803 USA

[3] Chinese Acad Sci, State Key Lab Funct Mat Informat, Shanghai 200050, Peoples R China

[4] Chinese Acad Sci, SIMIT, Ctr Excellence Superconducting Elect, Shanghai 200050, Peoples R China

[5] Beijing Normal Univ, Ctr Adv Quantum Studies, Beijing 100875, Peoples R China

[6] Beijing Normal Univ, Dept Phys, Beijing 100875, Peoples R China

[7] Chinese Acad Sci, Shanghai Synchrotron Radiat Facil, Shanghai Inst Appl Phys, Shanghai 201204, Peoples R China

[8] Oak Ridge Natl Lab, Neutron Scattering Div, POB 2009, Oak Ridge, TN 37831 USA

[9] NIST, Ctr Neutron Res, Gaithersburg, MD 20899 USA

[10] Louisiana State Univ, Dept Chem Engn, Baton Rouge, LA 70803 USA

来源：

PHYSICAL REVIEW B | 2019年 / 100卷 / 09期

关键词：

NEUTRON-DIFFRACTION; FERROMAGNETISM; SUPERCONDUCTIVITY;

D O I：

10.1103/PhysRevB.100.094446

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A series of Sr(Co1-xNix)(2)As-2 single crystals was synthesized, allowing a comprehensive phase diagram with respect to field, temperature, and chemical substitution to be established. Our neutron diffraction experiments revealed a helimagnetic order with magnetic moments ferromagnetically aligned in the ab plane and a helimagnetic wave vector of q = (0, 0, 0.56) for x = 0.1. The combination of neutron diffraction and angle-resolved photoemission spectroscopy measurements shows that the tuning of a flat band with d(x2-y2) orbital character drives the helimagnetism and indicates the possibility of a quantum order-by-disorder mechanism.

引用

页数：9

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