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A combined experimental and theoretical study of relaxation dynamics in the charge-density-wave system TbTe3 shows, how a dynamical insulator-to-metal transition affects fundamental interactions, such as electron-electron and electron-phonon scattering. Time- and angle-resolved photoemission spectroscopy utilizes optical excitation to transiently alter the energy gap and reveals a concurrent, highly unusual transient modulation of the relaxation rates of excited photocarriers.
State-of-the-art calculations [more...]