A magnetic topological semimetal Sr1-y Mn1-zSb2 (y, z < 0.1)

J. Y. Liu; J. Hu; Q. Zhang; D. Graf; H. B. Cao; S. M.A. Radmanesh; D. J. Adams; Y. L. Zhu; G. F. Cheng; X. Liu; W. A. Phelan; J. Wei; M. Jaime; F. Balakirev; D. A. Tennant; J. F. DItusa; I. Chiorescu; L. Spinu; Z. Q. Mao

doi:10.1038/nmat4953

A magnetic topological semimetal Sr_1-y Mn_1-zSb₂ (y, z < 0.1)

J. Y. Liu, J. Hu, Q. Zhang, D. Graf, H. B. Cao, S. M.A. Radmanesh, D. J. Adams, Y. L. Zhu, G. F. Cheng, X. Liu, W. A. Phelan, J. Wei, M. Jaime, F. Balakirev, D. A. Tennant, J. F. DItusa, I. Chiorescu, L. Spinu, Z. Q. Mao

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Abstract

Weyl (WSMs) evolve from Dirac semimetals in the presence of broken time-reversal symmetry (TRS) or space-inversion symmetry. The WSM phases in TaAs-class materials and photonic crystals are due to the loss of space-inversion symmetry. For TRS-breaking WSMs, despite numerous theoretical and experimental efforts, few examples have been reported. In this Article, we report a new type of magnetic semimetal Sr1_-y Mn_1-z Sb₂ (y, z < 0.1) with nearly massless relativistic fermion behaviour (m-=0.04-0.05m₀, where m 0 is the free-electron mass). This material exhibits a ferromagnetic order for 304 K<T<565 K, but a canted antiferromagnetic order with a ferromagnetic component for T<304 K. The combination of relativistic fermion behaviour and ferromagnetism in Sr 1_-y Mn_1-z Sb 2 offers a rare opportunity to investigate the interplay between relativistic fermions and spontaneous TRS breaking.

Original language	English
Pages (from-to)	905-910
Number of pages	6
Journal	Nature Materials
Volume	16
Issue number	9
DOIs	https://doi.org/10.1038/nmat4953
State	Published - Sep 1 2017

Funding

The authors thank C. Wu at UCSD for helpful discussions. The work at Tulane University was supported by the NSF under Grant DMR-1205469 (support for personnel and materials) and Louisiana Board of Regents under grant LEQSF(2014-15)-ENH-TR-24 (support for equipment purchase). The neutron scattering work used resources at the High Flux Isotope Reactor, a DOE Office of Science User Facility operated by the Oak Ridge National Laboratory, and is supported by the US Department of Energy under EPSCoR Grant No. DE-SC0012432 with additional support from the Louisiana Board of Regents. The work at UNO is supported by the NSF under the NSF EPSCoR Cooperative Agreement No. EPS-1003897 with additional support from the Louisiana Board of Regents. The work at FSU and at the National High Magnetic Field Laboratory is supported by the NSF grant No. DMR-1206267, the NSF Cooperative Agreement No. DMR-1157490, and the State of Florida. Work at LANL was supported by the US DOE Basic Energy Science project ‘Science at 100 Tesla’. The authors also acknowledge support from grant DOE DE-NA0001979.

Funders	Funder number
DOE Office of Science
US DOE Basic Energy Science
US Department of Energy
National Science Foundation	DMR-1205469
U.S. Department of Energy	DE-NA0001979
Directorate for Mathematical and Physical Sciences	1205469
Office of Experimental Program to Stimulate Competitive Research
Louisiana Board of Regents	LEQSF(2014-15)-ENH-TR-24
Fayetteville State University	DMR-1206267
Kansas NSF EPSCoR

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Liu, J. Y., Hu, J., Zhang, Q., Graf, D., Cao, H. B., Radmanesh, S. M. A., Adams, D. J., Zhu, Y. L., Cheng, G. F., Liu, X., Phelan, W. A., Wei, J., Jaime, M., Balakirev, F., Tennant, D. A., DItusa, J. F., Chiorescu, I., Spinu, L., & Mao, Z. Q. (2017). A magnetic topological semimetal Sr_1-y Mn_1-zSb₂ (y, z < 0.1). Nature Materials, 16(9), 905-910. https://doi.org/10.1038/nmat4953

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title = "A magnetic topological semimetal Sr1-y Mn1-zSb2 (y, z < 0.1)",

abstract = "Weyl (WSMs) evolve from Dirac semimetals in the presence of broken time-reversal symmetry (TRS) or space-inversion symmetry. The WSM phases in TaAs-class materials and photonic crystals are due to the loss of space-inversion symmetry. For TRS-breaking WSMs, despite numerous theoretical and experimental efforts, few examples have been reported. In this Article, we report a new type of magnetic semimetal Sr1-y Mn1-z Sb2 (y, z < 0.1) with nearly massless relativistic fermion behaviour (m-=0.04-0.05m0, where m 0 is the free-electron mass). This material exhibits a ferromagnetic order for 304 K-y Mn1-z Sb 2 offers a rare opportunity to investigate the interplay between relativistic fermions and spontaneous TRS breaking.",

author = "Liu, {J. Y.} and J. Hu and Q. Zhang and D. Graf and Cao, {H. B.} and Radmanesh, {S. M.A.} and Adams, {D. J.} and Zhu, {Y. L.} and Cheng, {G. F.} and X. Liu and Phelan, {W. A.} and J. Wei and M. Jaime and F. Balakirev and Tennant, {D. A.} and DItusa, {J. F.} and I. Chiorescu and L. Spinu and Mao, {Z. Q.}",

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AU - Cao, H. B.

AU - Radmanesh, S. M.A.

AU - Adams, D. J.

AU - Zhu, Y. L.

AU - Cheng, G. F.

AU - Liu, X.

AU - Phelan, W. A.

AU - Wei, J.

AU - Jaime, M.

AU - Balakirev, F.

AU - Tennant, D. A.

AU - DItusa, J. F.

AU - Chiorescu, I.

AU - Spinu, L.

AU - Mao, Z. Q.

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AB - Weyl (WSMs) evolve from Dirac semimetals in the presence of broken time-reversal symmetry (TRS) or space-inversion symmetry. The WSM phases in TaAs-class materials and photonic crystals are due to the loss of space-inversion symmetry. For TRS-breaking WSMs, despite numerous theoretical and experimental efforts, few examples have been reported. In this Article, we report a new type of magnetic semimetal Sr1-y Mn1-z Sb2 (y, z < 0.1) with nearly massless relativistic fermion behaviour (m-=0.04-0.05m0, where m 0 is the free-electron mass). This material exhibits a ferromagnetic order for 304 K-y Mn1-z Sb 2 offers a rare opportunity to investigate the interplay between relativistic fermions and spontaneous TRS breaking.

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A magnetic topological semimetal Sr_1-y Mn_1-zSb₂ (y, z < 0.1)

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