A quantum nonlinear response calculation shows that terahertz electric fields can generate phonon angular momentum in time-reversal-symmetric polar crystals through off-diagonal phonon angular momentum matrix elements.
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Phonon angular momentum induced by Terahertz electric field
A quantum nonlinear response calculation shows that terahertz electric fields can generate phonon angular momentum in time-reversal-symmetric polar crystals through off-diagonal phonon angular momentum matrix elements.