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.
This can be done by studying the dynamical unit vector ˆd because the pa- rameter dependence of the projection operators is given through this vector
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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.