NONADIABATIC BERRY PHASE IN NANOCRYSTALLINE MAGNETS

Nonadiabatic Berry phase in nanocrystalline magnets

It is investigated how a Berry phase is created in polycrystalline nanomagnets and how Wall Art the phase translates into an emergent magnetic field and into a topological Hall-effect contribution.The analysis starts directly from the spin of the conduction electrons and does not involve any adiabatic Hamiltonian.Completely random spin alignment in

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