Nature of Bosonic Excitations revealed by high-energy charge carriers

Abstract

We address a long standing problem concerning the origin of bosonic excitations that strongly interact with charge carriers. We show that the time-resolved pump-probe experiments are capable to distinguish between regular bosonic degrees of freedom, e.g. phonons, and the hard-core bosons, e.g., magnons. The ability of phonon degrees of freedom to absorb essentially unlimited amount of energy renders relaxation dynamics nearly independent on the absorbed energy or the fluence. In contrast, the hard core effects pose limits on the density of energy stored in the bosonic subsystems resulting in a substantial dependence of the relaxation time on the fluence and/or excitation energy. Very similar effects can be observed also in a different setup when the system is driven by multiple pulses of equal energy.

6 pages, 5 figures

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Cited by in corpus (6)

• Eigenstate thermalization and quantum chaos in the Holstein polaron model
• Eigenstate thermalization hypothesis through the lens of autocorrelation functions
• Finite-temperature density-matrix renormalization group method for electron-phonon systems: Thermodynamics and Holstein-polaron spectral functions
• Photo-induced nonequilibrium states in Mott insulators
• Optical manipulation of bipolarons in a system with nonlinear electron-phonon coupling
• Charge carrier relaxation dynamics in the one-dimensional Kondo lattice model