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Journal Article

Establishing nonthermal regimes in pump-probe electron relaxation dynamics


Michiardi,  M.
Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Na, M. X., Boschini, F., Mills, A. K., Michiardi, M., Day, R. P., Zwartsenberg, B., et al. (2020). Establishing nonthermal regimes in pump-probe electron relaxation dynamics. Physical Review B, 102: 184307, pp. 1-16. doi:10.1103/PhysRevB.102.184307.

Cite as: http://hdl.handle.net/21.11116/0000-0007-9D2A-A
Time- and angle-resolved photoemission spectroscopy (TR-ARPES) accesses the electronic structure of solids under optical excitation, and is a powerful technique for studying the coupling between electrons and collective modes. One approach to infer electron-boson coupling is through the relaxation dynamics of optically excited electrons, and the characteristic timescales of energy redistribution. A common description of electron relaxation dynamics is through the effective electronic temperature. Such a description requires that thermodynamic quantities are well-defined, an assumption that is generally violated at early delays. Additionally, precise estimation of the nonthermal window