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

doi:10.1103/PhysRevB.100.094446

This content will become publicly available on September 30, 2020

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

Abstract

A series of Sr(Co_1-$x$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:

^[1]; Liu, Zhonghao ^[2]; Xu, Zhuang ^[3]; Song, Yu ^[4]; Huang, Yaobo ^[5]; Shen, Dawei ^[2]; Ma, Ni ^[2]; Li, Ang ^[2]; Chi, Songxue ^[6]; Frontzek, Matthias ^[6]; Cao, Huibo ^[6]; Huang, Qingzhen ^[7]; Wang, Weiyi ^[4]; Xie, Yaofeng ^[4]; Zhang, Rui ^[4]; Rong, Yan ^[3]; Shelton, William A. ^[8]; Young, David P. ^[9]; DiTusa, J. F. ^[9]; Dai, Pengcheng ^[10]

Rice Univ., Houston, TX (United States). Dept. of Physics and Astronomy; Louisiana State Univ., Baton Rouge, LA (United States). Dept. of Physics and Astronomy
Chinese Academy of Sciences, Shanghai (China). State Key Lab. of Functional Materials for Informatics and Center for Excellence in Superconducting Electronics
Beijing Normal Univ., Beijing (China). Center for Advanced Quantum Studies and Dept. of Physics
Rice Univ., Houston, TX (United States). Dept. of Physics and Astronomy
Chinese Academy of Sciences, Shanghai (China). Shanghai Inst. of Applied Physics, Shanghai Synchrotron Radiation Facility
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Neutron Scattering Division
National Inst. of Standards and Technology, Gaithersburg, MA (United States). NIST Center for Neutron Research
Lousiana State Univ., Baton Rouge, LA (United States). Dept. of Chemical Engineering
Louisiana State Univ., Baton Rouge, LA (United States). Dept. of Physics and Astronomy
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:: 2019-09-30

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.

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                    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.

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                    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.

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@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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A thermodynamic theory of “weak” ferromagnetism of antiferromagnetics
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Unconventional superconductivity in magic-angle graphene superlattices
journal, March 2018

Ferromagnetism in a Narrow, Almost Half-Filled $s$ Band
journal, July 1966

Magnetic phase transition in single crystals of the chiral helimagnet Cr $_{1 / 3}$ NbS $_{2}$
journal, March 2013

Flatbands and Emergent Ferromagnetic Ordering in ${Fe}_{3} {Sn}_{2}$ Kagome Lattices
journal, August 2018

Four-circle single-crystal neutron diffractometer at the High Flux Isotope Reactor
journal, May 2011

Density Functional Study of ${LaFeAsO}_{1 - x} F_{x}$ : A Low Carrier Density Superconductor Near Itinerant Magnetism
journal, June 2008

Antiferromagnetic stacking of ferromagnetic layers and doping-controlled phase competition in ${Ca}_{1 - x} {Sr}_{x} {Co}_{2 - y} {As}_{2}$
journal, July 2019

La structure des substances magnetiques
journal, October 1959

A Neutron diffraction study of the magnetic structure of EuCo2P2
journal, May 1992

Neutron-scattering study of antiferromagnetism in ${YBa}_{2}$ ${Cu}_{3}$ $O_{6.15}$
journal, November 1993

Reduced electronic correlation effects in half substituted Ba(Fe _1−x Co _x ) ₂ As ₂
journal, June 2018

Quantum Phase Transitions in the Itinerant Ferromagnet ${Z r Z n}_{2}$
journal, December 2004

Neutron Diffraction Studies of Antiferromagnetism in Manganous Fluoride and Some Isomorphous Compounds
journal, June 1953

Chiral Magnetic Soliton Lattice on a Chiral Helimagnet
journal, March 2012

Exploring the origins of the Dzyaloshinskii-Moriya interaction in MnSi
journal, December 2017

Relation between the specific heat and susceptibility of an antiferromagnet
journal, October 1962

Antiferromagnetic order and spin dynamics in iron-based superconductors
journal, August 2015

Magnetic structure and magnetization of helical antiferromagnets in high magnetic fields perpendicular to the helix axis at zero temperature
journal, September 2017

WAND ² —A versatile wide angle neutron powder/single crystal diffractometer
journal, September 2018

EXPGUI , a graphical user interface for GSAS
journal, April 2001

Unconventional Anisotropic $s$ -Wave Superconducting Gaps of the LiFeAs Iron-Pnictide Superconductor
journal, January 2012

Inhomogeneous Phase Formation on the Border of Itinerant Ferromagnetism
journal, November 2009

Skyrmion Lattice in a Chiral Magnet
journal, February 2009

Unconventional Superconductivity with a Sign Reversal in the Order Parameter of ${LaFeAsO}_{1 - x} F_{x}$
journal, July 2008

From Nagaoka's Ferromagnetism to Flat-Band Ferromagnetism and Beyond: An Introduction to Ferromagnetism in the Hubbard Model
journal, April 1998

Coexistence of Ferromagnetic and Stripe Antiferromagnetic Spin Fluctuations in ${SrCo}_{2} {As}_{2}$
journal, March 2019

Angle-resolved spectroscopy study of Ni-based superconductor ${SrNi}_{2} {As}_{2}$
journal, July 2016

Non-Fermi-liquid types of behavior associated with a magnetic quantum critical point in $Sr {({Co}_{1 - x} {Ni}_{x})}_{2} {As}_{2}$ single crystals
journal, September 2019

Magnetization Process of a Screw Spin System
journal, June 1962

Electronic Band Structure of ${BaCo}_{2} {As}_{2}$ : A Fully Doped Ferropnictide Analog with Reduced Electronic Correlations
journal, January 2013

Coexistence of $p$ -state superconductivity and itinerant ferromagnetism
journal, October 1980

On the origin of gravity and the laws of Newton
journal, April 2011

Correlated insulator behaviour at half-filling in magic-angle graphene superlattices
journal, March 2018

Helical spin structure in manganese silicide MnSi
journal, July 1976

Competing Magnetic Fluctuations in Iron Pnictide Superconductors: Role of Ferromagnetic Spin Correlations Revealed by NMR
journal, September 2015

Crystal and magnetic structure of CaCo $_{1.86}$ As $_{2}$ studied by x-ray and neutron diffraction
journal, November 2013

Quantum Order-by-Disorder in Strongly Correlated Metals
journal, March 2018

Electronic band structure and proximity to magnetic ordering in the chiral cubic compound CrGe
journal, February 2019

Anisotropic Superexchange Interaction and Weak Ferromagnetism
journal, October 1960

Spin-flop transition and magnetic phase diagram in ${CaCo}_{2} {As}_{2}$ revealed by torque measurements
journal, October 2015

Renormalized behavior and proximity of ${BaCo}_{2} {As}_{2}$ to a magnetic quantum critical point
journal, January 2009

A New Type of Antiferromagnetic Structure in the Rutile Type Crystal
journal, June 1959

A common thread: The pairing interaction for unconventional superconductors
journal, October 2012

Electronic structure and spin dynamics of $A C o_{2} A s_{2} (A = Ba, Sr, Ca)$
journal, September 2018

Effective One-Dimensional Coupling in the Highly Frustrated Square-Lattice Itinerant Magnet ${CaCo}_{2 - y} {As}_{2}$
journal, October 2017

Order as an effect of disorder
journal, January 1980

Helical glasses near ferromagnetic quantum criticality
journal, June 2013