About this Abstract |
Meeting |
2020 TMS Annual Meeting & Exhibition
|
Symposium
|
Computational Discovery and Design of Emerging Materials
|
Presentation Title |
Effect of Spin-orbit Coupling on Magnetic Phase Transition of Anti-ferromagnetic Weyl-Semimetal |
Author(s) |
Sugata Chowdhury, Kevin F. Garrity, Angela R. Hight Walker, Cindi L. Dennis, Albert Davydov, Francesca Tavazza |
On-Site Speaker (Planned) |
Sugata Chowdhury |
Abstract Scope |
Three-dimensional materials with strong spin-orbit coupling (SOC) and broken time reversal symmetry (TRS) due to magnetic ordering have been the subject of enormous interest because, these materials can carry the spin-polarized edge states even in the absence of an external magnetic field. Our calculations reveal that the ferromagnetic phase of bulk Bi2MnTe4 (X=Se, Te) is either a nodal line or Weyl semimetal, depending on the direction of the spins and its electronic properties depend on the thickness of the materials. However, the intrinsic TRS breaking at the surface of Bi2MnTe4 removes the typical Dirac cone feature, allowing the observation of the half-integer quantum anomalous Hall effect (QAHE). We found the correlated canted spin-structure and the in-plane spin-interaction is strong compare to the out-of-plane spin-interactions. We will discuss the electron-phonon coupling and magnonic behavior of these materials. This kind of stoichiometric magnetic materials are an excellent candidate for spintronics devices. |
Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |