Time-resolved optical spectroscopy on La3Ni2O7 reveals two high-energy excitations with density-wave gaps of 54 meV and 67 meV, relaxation via the Rothwarf-Taylor model, and four coherent phonons with distinct electronic couplings and softening behavior.
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Extended-time pump-probe spectroscopy in Ta2NiSe5 reveals a previously undetected long-lived relaxation channel of 280-600 ps attributed to exciton-nonequilibrium phonon scattering, along with two coherent phonon modes showing different couplings to the excitonic order.
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High-energy electronic excitations in La3Ni2O7 by time-resolved optical spectroscopy
Time-resolved optical spectroscopy on La3Ni2O7 reveals two high-energy excitations with density-wave gaps of 54 meV and 67 meV, relaxation via the Rothwarf-Taylor model, and four coherent phonons with distinct electronic couplings and softening behavior.
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Uncovering long-lived relaxation channel and exciton-phonon coupling in \textrm{Ta\textsubscript{2}NiSe\textsubscript{5}} via non-degenerate pump-probe spectroscopy
Extended-time pump-probe spectroscopy in Ta2NiSe5 reveals a previously undetected long-lived relaxation channel of 280-600 ps attributed to exciton-nonequilibrium phonon scattering, along with two coherent phonon modes showing different couplings to the excitonic order.