A magnetic topological semimetal Sr1-yMn1-zSb2 (y, z< 0.1)
Autor: | 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., Tennant, D. A., DiTusa, J. F., Chiorescu, I., Spinu, L., Mao, Z. Q. |
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Rok vydání: | 2015 |
Předmět: | |
Zdroj: | Nature Materials 16, 905-910 (2017) |
Druh dokumentu: | Working Paper |
DOI: | 10.1038/nmat4953 |
Popis: | 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-yMn1-zSb2 (y,z<0.1) with nearly massless relativistic fermion behaviour (m*=0.04-0.05m0, where m0 is the free electron mass). This material exhibits a ferromagnetic order for 304K < T < 565K, but a canted antiferromagnetic order with a ferromagnetic component for T < 304K. The combination of relativistic fermion behaviour and ferromagnetism in Sr1-yMn1-zSb2 offers a rare opportunity to investigate the interplay between relativistic fermions and spontaneous TRS breaking. Comment: Accepted by Nature Materials |
Databáze: | arXiv |
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