Tunable Magnetic and Topological Phases in EuMnXBi2 Pnictides
Analysis
This paper investigates the electronic, magnetic, and topological properties of layered pnictides EuMnXBi2 (X = Mn, Fe, Co, Zn) using density functional theory (DFT). It highlights the potential of these materials, particularly the Bi-based compounds, for exploring tunable magnetic and topological phases. The study demonstrates how spin-orbit coupling, chemical substitution, and electron correlations can be used to engineer these phases, opening avenues for exploring a wide range of electronic and magnetic phenomena.
Key Takeaways
- •EuMnXBi2 pnictides are a promising platform for exploring tunable magnetic and topological phases.
- •Spin-orbit coupling, chemical substitution, and electron correlations can be used to engineer these phases.
- •EuMn2Bi2 exhibits a transition from an antiferromagnetic semiconductor to a Weyl semimetal with SOC.
- •Substitution of Mn with Fe, Co, and Zn leads to different magnetic ground states and semimetallic behavior.
“EuMn2Bi2 stabilizes in a C-type antiferromagnetic ground state with a narrow-gap semiconducting character. Inclusion of spin-orbit coupling (SOC) drives a transition from this trivial antiferromagnetic semiconductor to a Weyl semimetal hosting four symmetry-related Weyl points and robust Fermi arc states.”