Influence of magnetism on Dirac semimetallic behavior in nonstoichiometric ${\mathrm{Sr}}_{1y}{\mathrm{Mn}}_{1z}{\mathrm{Sb}}_{2}\phantom{\rule{0ex}{0ex}}\left(y~0.07,z~0.02\right)$
Abstract
Nonstoichiometric Sr_{1y}Mn_{1z}Sb_{2}(y,z < 0.1) is known to exhibit a coexistence of magnetic order and the nontrivial semimetallic behavior. Here, we report the magnetism and its strong coupling to the semimetallic behavior, by a combined use of inelastic neutron scattering (INS) and density functional theory (DFT). A phase separation consisting of a majority antiferromagentic phase and a minority ferromagnetic phase is proposed. We found a relatively large spin excitation gap ≈ 8.5meV at 5 K, and the interlayer magnetic exchange constant only 2.8% of the dominant intralayer magnetic interaction, evidencing a quasi2D magnetism in Sr_{1y}Mn_{1z}Sb_{2}. Using DFT, we find a strong influence of magnetic orders on the electronic band structure and the Dirac dispersions near the Fermi level along the YS direction in the presence of a ferromagnetic order. Furthermore, we demonstrate that the size of the ferromagnetic ordered moment is an effective strategy to tune Dirac/Weyl dispersions near the Fermi level. Lastly, our study unveils novel interplay between the magnetic order, ordered moment, and electronic band topology in Sr_{1y}Mn_{1z}Sb_{2} and opens pathways to control the relativistic band structure.
 Authors:

 Louisiana State Univ., Baton Rouge, LA (United States); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
 Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
 Tulane Univ., New Orleans, LA (United States)
 Louisiana State Univ., Baton Rouge, LA (United States)
 Tulane Univ., New Orleans, LA (United States) ; Pennsylvania State Univ., University Park, PA (United States)
 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)
 OSTI Identifier:
 1607177
 Grant/Contract Number:
 AC0500OR22725; SC0012432
 Resource Type:
 Accepted Manuscript
 Journal Name:
 Physical Review B
 Additional Journal Information:
 Journal Volume: 100; Journal Issue: 20; Journal ID: ISSN 24699950
 Publisher:
 American Physical Society (APS)
 Country of Publication:
 United States
 Language:
 English
 Subject:
 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; Electronic structure; Spin dynamics; Dirac semimetal; Density functional theory; Inelastic neutron scattering
Citation Formats
Zhang, Qiang, Okamoto, Satoshi, Stone, Matthew B., Liu, Jinyu, Zhu, Yanglin, DiTusa, John, Mao, Zhiqiang, and Tennant, Alan. Influence of magnetism on Dirac semimetallic behavior in nonstoichiometric Sr1yMn1zSb2(y~0.07,z~0.02). United States: N. p., 2019.
Web. doi:10.1103/PhysRevB.100.205105.
Zhang, Qiang, Okamoto, Satoshi, Stone, Matthew B., Liu, Jinyu, Zhu, Yanglin, DiTusa, John, Mao, Zhiqiang, & Tennant, Alan. Influence of magnetism on Dirac semimetallic behavior in nonstoichiometric Sr1yMn1zSb2(y~0.07,z~0.02). United States. https://doi.org/10.1103/PhysRevB.100.205105
Zhang, Qiang, Okamoto, Satoshi, Stone, Matthew B., Liu, Jinyu, Zhu, Yanglin, DiTusa, John, Mao, Zhiqiang, and Tennant, Alan. Tue .
"Influence of magnetism on Dirac semimetallic behavior in nonstoichiometric Sr1yMn1zSb2(y~0.07,z~0.02)". United States. https://doi.org/10.1103/PhysRevB.100.205105. https://www.osti.gov/servlets/purl/1607177.
@article{osti_1607177,
title = {Influence of magnetism on Dirac semimetallic behavior in nonstoichiometric Sr1yMn1zSb2(y~0.07,z~0.02)},
author = {Zhang, Qiang and Okamoto, Satoshi and Stone, Matthew B. and Liu, Jinyu and Zhu, Yanglin and DiTusa, John and Mao, Zhiqiang and Tennant, Alan},
abstractNote = {Nonstoichiometric Sr1yMn1zSb2(y,z < 0.1) is known to exhibit a coexistence of magnetic order and the nontrivial semimetallic behavior. Here, we report the magnetism and its strong coupling to the semimetallic behavior, by a combined use of inelastic neutron scattering (INS) and density functional theory (DFT). A phase separation consisting of a majority antiferromagentic phase and a minority ferromagnetic phase is proposed. We found a relatively large spin excitation gap ≈ 8.5meV at 5 K, and the interlayer magnetic exchange constant only 2.8% of the dominant intralayer magnetic interaction, evidencing a quasi2D magnetism in Sr1yMn1zSb2. Using DFT, we find a strong influence of magnetic orders on the electronic band structure and the Dirac dispersions near the Fermi level along the YS direction in the presence of a ferromagnetic order. Furthermore, we demonstrate that the size of the ferromagnetic ordered moment is an effective strategy to tune Dirac/Weyl dispersions near the Fermi level. Lastly, our study unveils novel interplay between the magnetic order, ordered moment, and electronic band topology in Sr1yMn1zSb2 and opens pathways to control the relativistic band structure.},
doi = {10.1103/PhysRevB.100.205105},
journal = {Physical Review B},
number = 20,
volume = 100,
place = {United States},
year = {2019},
month = {11}
}
Web of Science
Works referenced in this record:
AEMnSb _{2} (AE=Sr, Ba): a new class of Dirac materials
journal, January 2014
 Farhan, M. Arshad; Lee, Geunsik; Shim, Ji Hoon
 Journal of Physics: Condensed Matter, Vol. 26, Issue 4
Weyl and Dirac semimetals in threedimensional solids
journal, January 2018
 Armitage, N. P.; Mele, E. J.; Vishwanath, Ashvin
 Reviews of Modern Physics, Vol. 90, Issue 1
Superconductivity and Dirac fermions in 112phase pnictides: Superconductivity and Dirac fermions in 112phase pnictides
journal, August 2016
 Ray, Soumya J.; Alff, Lambert
 physica status solidi (b), Vol. 254, Issue 1
Structure and magnetic properties of $Ln\mathrm{MnSbO}$ ( $Ln=\mathrm{La}$ and Ce)
journal, March 2016
 Zhang, Qiang; Kumar, C. M. N.; Tian, Wei
 Physical Review B, Vol. 93, Issue 9
Projector augmentedwave method
journal, December 1994
 Blöchl, P. E.
 Physical Review B, Vol. 50, Issue 24, p. 1795317979
Nontrivial Berry phase in magnetic BaMnSb _{2} semimetal
journal, May 2017
 Huang, Silu; Kim, Jisun; Shelton, W. A.
 Proceedings of the National Academy of Sciences, Vol. 114, Issue 24
Electronic structure of AlFeN films exhibiting crystallographic orientation change from c to aaxis with Fe concentrations and annealing effect
journal, February 2020
 Tatemizo, Nobuyuki; Imada, Saki; Okahara, Kizuna
 Scientific Reports, Vol. 10, Issue 1
Field Dependence of the Intrinsic Domain Magnetization of a Ferromagnet
journal, December 1940
 Holstein, T.; Primakoff, H.
 Physical Review, Vol. 58, Issue 12
Layered transitionmetal pnictide SrMnBi ${}_{2}$ with metallic blocking layer
journal, August 2011
 Wang, Jiakui K.; Zhao, Liang L.; Yin, Quan
 Physical Review B, Vol. 84, Issue 6
Kondo effect in threedimensional Dirac and Weyl systems
journal, September 2015
 Mitchell, Andrew K.; Fritz, Lars
 Physical Review B, Vol. 92, Issue 12
Efficient iterative schemes for ab initio totalenergy calculations using a planewave basis set
journal, October 1996
 Kresse, G.; Furthmüller, J.
 Physical Review B, Vol. 54, Issue 16, p. 1116911186
Shubnikovde Haas oscillations of massive Dirac fermions in a Dirac antiferromagnet SrMnSb2
journal, March 2019
 You, Jung Sang; Lee, Inho; Choi, E. S.
 Current Applied Physics, Vol. 19, Issue 3
Nearly massless Dirac fermions hosted by Sb square net in BaMnSb2
journal, July 2016
 Liu, Jinyu; Hu, Jin; Cao, Huibo
 Scientific Reports, Vol. 6, Issue 1
From ultrasoft pseudopotentials to the projector augmentedwave method
journal, January 1999
 Kresse, G.; Joubert, D.
 Physical Review B, Vol. 59, Issue 3, p. 17581775
Topological quantum chemistry
journal, July 2017
 Bradlyn, Barry; Elcoro, L.; Cano, Jennifer
 Nature, Vol. 547, Issue 7663
A magnetic topological semimetal Sr1−yMn1−zSb2 (y, z < 0.1)
journal, July 2017
 Liu, J. Y.; Hu, J.; Zhang, Q.
 Nature Materials, Vol. 16, Issue 9
Dirac Semimetals in Two Dimensions
journal, September 2015
 Young, Steve M.; Kane, Charles L.
 Physical Review Letters, Vol. 115, Issue 12
Reducing DzyaloshinskiiMoriya interaction and fieldfree spinorbit torque switching in synthetic antiferromagnets
journal, May 2021
 Chen, Ruyi; Cui, Qirui; Liao, Liyang
 Nature Communications, Vol. 12, Issue 1
Universal window for twodimensional critical exponents
journal, June 2008
 Taroni, A.; Bramwell, S. T.; Holdsworth, P. C. W.
 Journal of Physics: Condensed Matter, Vol. 20, Issue 27
Electronic structure of the candidate 2D Dirac semimetal SrMnSb2: a combined experimental and theoretical study
journal, January 2018
 Ramankutty, Shyama Varier; Henke, Jans; Schiphorst, Adriaan
 SciPost Physics, Vol. 4, Issue 2
Linear spin wave theory for singleQ incommensurate magnetic structures
journal, March 2015
 Toth, S.; Lake, B.
 Journal of Physics: Condensed Matter, Vol. 27, Issue 16
Interplay of Dirac electrons and magnetism in CaMnBi2 and SrMnBi2
journal, December 2016
 Zhang, Anmin; Liu, Changle; Yi, Changjiang
 Nature Communications, Vol. 7, Issue 1
RKKY interaction of magnetic impurities in Dirac and Weyl semimetals
journal, December 2015
 Chang, HaoRan; Zhou, Jianhui; Wang, ShiXiong
 Physical Review B, Vol. 92, Issue 24
Similar ultrafast dynamics of several dissimilar Dirac and Weyl semimetals
journal, December 2017
 Weber, Chris P.; Berggren, Bryan S.; Masten, Madison G.
 Journal of Applied Physics, Vol. 122, Issue 22
Spin dynamics in the antiferromagnetic phases of the Dirac metals $A{\mathrm{MnBi}}_{2}$ ( $A=\mathrm{Sr},\mathrm{Ca}$ )
journal, April 2017
 Rahn, M. C.; Princep, A. J.; Piovano, A.
 Physical Review B, Vol. 95, Issue 13
Coupling of magnetic order to planar Bi electrons in the anisotropic Dirac metals $A{\mathrm{MnBi}}_{2}(A=\mathrm{Sr},\mathrm{Ca})$
journal, August 2014
 Guo, Y. F.; Princep, A. J.; Zhang, X.
 Physical Review B, Vol. 90, Issue 7
Spin reorientation and CeMn coupling in antiferromagnetic oxypnictide CeMnAsO
journal, February 2015
 Zhang, Qiang; Tian, Wei; Peterson, Spencer G.
 Physical Review B, Vol. 91, Issue 6
Twodimensional gas of massless Dirac fermions in graphene
journal, November 2005
 Novoselov, K. S.; Geim, A. K.; Morozov, S. V.
 Nature, Vol. 438, Issue 7065, p. 197200
Universal Window for Two Dimensional Critical Exponents
text, January 2008
 Taroni, Andrea; Bramwell, Steven T.; Holdsworth, Peter C. W.
 arXiv
Linear spin wave theory for singleQ incommensurate magnetic structures
text, January 2014
 Toth, S.; Lake, B.
 arXiv
Spin reorientation and CeMn coupling in antiferromagnetic oxypnictide CeMnAsO
text, January 2014
 Zhang, Qiang; Tian, Wei; Peterson, Spencer G.
 arXiv
RKKY interaction of magnetic impurities in Dirac and Weyl semimetals
text, January 2015
 Chang, HaoRan; Zhou, Jianhui; Wang, ShiXiong
 arXiv
Weyl and Dirac Semimetals in Three Dimensional Solids
text, January 2017
 Armitage, N. P.; Mele, E. J.; Vishwanath, Ashvin
 arXiv
Nontrivial Berry phase in magnetic BaMnSb2 semimetal
text, January 2017
 Huang, Silu; Kim, Jisun; Shelton, W. A.
 arXiv