Theoretical analysis finds quasiparticles carry angular momentum in solids, suggesting applications in orbitronics.
Quasiparticles in solids may carry charge and spin. Recent theoretical and experimental studies found that quasiparticles may carry additional types of angular momentum. Conduction electrons in solids may carry orbital angular momentum and phonons may also carry angular momentum, which amounts to the circular or elliptic vibration of atoms. In addition, quasiparticle angular momentum may play significant roles in various phenomena in solids. Studies towards this direction may find useful device applications. This work summarizes recent development in the field of orbitronics with focus on its theoretical aspects. The discussed topics include the electron orbital Rashba effect, electron orbital dynamics, phonon angular momentum, and magnon angular momentum.
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Han et al. (2025) studied this question.
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