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Title: Flat-band magnetism and helical magnetic order in Ni-doped SrCo 2 As 2

Abstract

A series of Sr(Co1-$x$Ni$x$)2As2 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. Finally, the combination of neutron diffraction and angle-resolved photoemission spectroscopy measurements shows that the tuning of a flat band with $$d_{x^2-y^2}$$ orbital character drives the helimagnetism and indicates the possibility of a quantum order-by-disorder mechanism.

Authors:
ORCiD logo [1];  [2];  [3];  [4];  [5];  [2];  [2];  [2];  [6];  [6];  [6];  [7];  [4];  [4];  [4];  [3];  [8];  [9];  [9];  [10]
  1. Rice Univ., Houston, TX (United States). Dept. of Physics and Astronomy; Louisiana State Univ., Baton Rouge, LA (United States). Dept. of Physics and Astronomy
  2. Chinese Academy of Sciences, Shanghai (China). State Key Lab. of Functional Materials for Informatics and Center for Excellence in Superconducting Electronics
  3. Beijing Normal Univ., Beijing (China). Center for Advanced Quantum Studies and Dept. of Physics
  4. Rice Univ., Houston, TX (United States). Dept. of Physics and Astronomy
  5. Chinese Academy of Sciences, Shanghai (China). Shanghai Inst. of Applied Physics, Shanghai Synchrotron Radiation Facility
  6. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Neutron Scattering Division
  7. National Inst. of Standards and Technology, Gaithersburg, MA (United States). NIST Center for Neutron Research
  8. Lousiana State Univ., Baton Rouge, LA (United States). Dept. of Chemical Engineering
  9. Louisiana State Univ., Baton Rouge, LA (United States). Dept. of Physics and Astronomy
  10. Rice Univ., Houston, TX (United States). Dept. of Physics and Astronomy; Beijing Normal Univ., Beijing (China). Center for Advanced Quantum Studies and Dept. of Physics
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1569360
Grant/Contract Number:  
AC05-00OR22725
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review B
Additional Journal Information:
Journal Volume: 100; Journal Issue: 9; Journal ID: ISSN 2469-9950
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY

Citation Formats

Li, Yu, Liu, Zhonghao, Xu, Zhuang, Song, Yu, Huang, Yaobo, Shen, Dawei, Ma, Ni, Li, Ang, Chi, Songxue, Frontzek, Matthias, Cao, Huibo, Huang, Qingzhen, Wang, Weiyi, Xie, Yaofeng, Zhang, Rui, Rong, Yan, Shelton, William A., Young, David P., DiTusa, J. F., and Dai, Pengcheng. Flat-band magnetism and helical magnetic order in Ni-doped SrCo2As2. United States: N. p., 2019. Web. doi:10.1103/PhysRevB.100.094446.
Li, Yu, Liu, Zhonghao, Xu, Zhuang, Song, Yu, Huang, Yaobo, Shen, Dawei, Ma, Ni, Li, Ang, Chi, Songxue, Frontzek, Matthias, Cao, Huibo, Huang, Qingzhen, Wang, Weiyi, Xie, Yaofeng, Zhang, Rui, Rong, Yan, Shelton, William A., Young, David P., DiTusa, J. F., & Dai, Pengcheng. Flat-band magnetism and helical magnetic order in Ni-doped SrCo2As2. United States. doi:10.1103/PhysRevB.100.094446.
Li, Yu, Liu, Zhonghao, Xu, Zhuang, Song, Yu, Huang, Yaobo, Shen, Dawei, Ma, Ni, Li, Ang, Chi, Songxue, Frontzek, Matthias, Cao, Huibo, Huang, Qingzhen, Wang, Weiyi, Xie, Yaofeng, Zhang, Rui, Rong, Yan, Shelton, William A., Young, David P., DiTusa, J. F., and Dai, Pengcheng. Mon . "Flat-band magnetism and helical magnetic order in Ni-doped SrCo2As2". United States. doi:10.1103/PhysRevB.100.094446.
@article{osti_1569360,
title = {Flat-band magnetism and helical magnetic order in Ni-doped SrCo2As2},
author = {Li, Yu and Liu, Zhonghao and Xu, Zhuang and Song, Yu and Huang, Yaobo and Shen, Dawei and Ma, Ni and Li, Ang and Chi, Songxue and Frontzek, Matthias and Cao, Huibo and Huang, Qingzhen and Wang, Weiyi and Xie, Yaofeng and Zhang, Rui and Rong, Yan and Shelton, William A. and Young, David P. and DiTusa, J. F. and Dai, Pengcheng},
abstractNote = {A series of Sr(Co1-$x$Ni$x$)2As2 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. Finally, the combination of neutron diffraction and angle-resolved photoemission spectroscopy measurements shows that the tuning of a flat band with $d_{x^2-y^2}$ orbital character drives the helimagnetism and indicates the possibility of a quantum order-by-disorder mechanism.},
doi = {10.1103/PhysRevB.100.094446},
journal = {Physical Review B},
number = 9,
volume = 100,
place = {United States},
year = {2019},
month = {9}
}

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