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TT: Fachverband Tiefe Temperaturen

TT 48: Poster Session: Many Body Systems, Quantum Critical Phenomena

TT 48.10: Poster

Mittwoch, 18. März 2020, 15:00–19:00, P2/4OG

Non-equilibrium dynamics of photo-induced triplons — •Hossam Tohamy and Maria Daghofer — University Stuttgart, Institute for Functional Matter and Quantum Technologies, Pfaffenwaldring 57, 70569 Stuttgart, Germany

We study the non-equilibrium dynamics of photo-induced triplons in periodically driven Mott insulators. Strong spin-orbit coupling in these systems favors a (J=0) singlet ground state while magnetic superexchange favors (J=1) triplet excited states. Triplons are excitations from singlet to triplet states.

We numerically simulate a pump-probe experiment for a 1D spin-orbital Hubbard model using the Lanczos exact diagonalization method. For certain laser pulse excitation frequencies and interaction parameters in the spin-orbital Hubbard model, we find that induced triplet states show antiferromagnetic (AFM) correlations. Both the strength of the triplet moment and the modulation of the AFM pattern depend on the laser excitation frequency, pulse width, and amplitude.