Speaker
Jannik Gondolf
(Niels Bohr Institute, University of Copenhagen)
Description
The Lieb lattice is a promising framework for $d$-wave altermagnetic material candidates. We explore the physics arising from multiple orbitals present at the Fermi level and the consequences for stabilizing altermagnetism on the Lieb lattice by deriving microscopic tight-binding models for different orbitals. We show that for vanadium oxichalcogenide candidate materials with $d_{xy}$ and $d_{xz/yz}$ orbitals at the Fermi level, the $d_{xy}$ orbital is crucial to stabilize the altermagnetic order, and the $d_{xz/yz}$ orbital becomes altermagnetic through coupling. We further study implications for potential topological states in the presence of spin-orbit coupling.
Authors
Mercè Roig
(University of Wisconsin-Milwaukee)
Jannik Gondolf
(Niels Bohr Institute, University of Copenhagen)
Andreas Kreisel
(Uppsala University)
Brian Moller Andersen
(Niels Bohr Institute, University of Copenhagen)
Daniel Agterberg
(University of Wisconsin-Milwaukee)