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<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 Mn1-z Sb 2 offers a rare opportunity to investigate the interplay between relativistic fermions and spontaneous TRS breaking.
Original language | English (US) |
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Pages (from-to) | 905-910 |
Number of pages | 6 |
Journal | Nature Materials |
Volume | 16 |
Issue number | 9 |
DOIs | |
State | Published - Sep 1 2017 |
All Science Journal Classification (ASJC) codes
- General Chemistry
- General Materials Science
- Condensed Matter Physics
- Mechanics of Materials
- Mechanical Engineering