Magnon thermal Hall and spin Nernst conductivities in a Lieb lattice altermagnet scale with the altermagnetic splitting, computable from a new closed-form symplectic quantum geometric tensor.
Another promising altermagnet candidate on a Lieb lattice is the correlated insulating d-wave al- termagnet La2O3Mn2Se2 [36]
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Quantum geometry and magnon Hall transport in an altermagnet
Magnon thermal Hall and spin Nernst conductivities in a Lieb lattice altermagnet scale with the altermagnetic splitting, computable from a new closed-form symplectic quantum geometric tensor.