Topological semimetal Sr1-yMn1-ZSb2
Abstract
Recent discoveries of topological Weyl semimetals in noncentrosymmetric monopnictides TX (T =Ta/Nb, X =As/P) and photonic crystals have generated immense interests since they represent new topological states of quantum matter. Time reversal symmetry (TRS) breaking Weyl semimetal was also recently reported in YbMnBi2. In this talk, we report a new type of topological semimetal phase arising from two-dimensional Sb layers in Sr1- y Mn1- z Sb2 (y, z<0.1), which coexists with ferromagnetism. Through quantum transport measurements on this material, we reveal remarkable signatures of relativistic fermions, including light effective quasiparticle mass, high carrier mobility, a π Berry phase and valley polarized interlayer conduction. Given Sr1- y Mn1- z Sb2 shows ferromagnetism, it offers a wonderful opportunity to explore the TRS breaking Weyl state
- Publication:
-
APS March Meeting Abstracts
- Pub Date:
- 2016
- Bibcode:
- 2016APS..MARV29006L