Spin-split magnon bands in a honeycomb altermagnet model produce a pure transverse spin current, with about a 3.3 degree spin-splitting angle, according to a quantum-kinetic calculation.
The momentum resolved matrix Hamiltonian Hk is given by, Hk = J ′ + γA(k) J Sγ(k) J Sγ(k)∗ J ′ + γB(k) , (B17) with J ′ = 3J S− 2KS
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Spin-split magnon bands induce pure spin current in insulating altermagnets
Spin-split magnon bands in a honeycomb altermagnet model produce a pure transverse spin current, with about a 3.3 degree spin-splitting angle, according to a quantum-kinetic calculation.