Chiral phonons in L3_1 helical crystals generate rotational electron-phonon interactions that drive orbital angular momentum transfer m_ℓ to m_ℓ - m_s, with the response suppressed at Γ and zone boundary but enhanced at intermediate wavevectors due to phonon band degeneracies.
Bariši ´c, Phys
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Microscopic Theory of Chiral-Phonon-Induced Orbital Selectivity in Helical Crystals
Chiral phonons in L3_1 helical crystals generate rotational electron-phonon interactions that drive orbital angular momentum transfer m_ℓ to m_ℓ - m_s, with the response suppressed at Γ and zone boundary but enhanced at intermediate wavevectors due to phonon band degeneracies.