Anisotropic phonon dynamics in Dirac semimetal PtTe2 thin films enabled by helicity-dependent ultrafast light excitation
Chinese Academy of SciencesDirac semimetal PtTe2 holds great promise for next-generation low-power spintronics and optoelectronics devices. To achieve high performance in these devices, a deep study of phonon dynamics is crucial. Towards this goal, Chinese scientists, using all-optical ultrafast pump-probe and Raman scattering techniques, have discovered the generation mechanism of Eg-mode phonons driven by spin-polarized electrons and elucidated unusual dissipation process via electron-phonon scattering. This work paves the way for potential future breakthroughs in the field of spintronics and optoelectronics.