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O: Fachverband Oberflächenphysik
O 14: Ultrafast electron dynamics at surface and interfaces I
O 14.9: Vortrag
Montag, 9. März 2026, 17:15–17:30, TRE/MATH
Theory of resonantly enhanced light-induced superconducting pairing in K3C60 — •Juan I. Aranzadi1, Joseph Tindall2, Paul Fadler1, and Michael A. Sentef1, 3 — 1Institute for Theoretical Physics, University of Bremen/ BCCMS — 2Center for Computational Quantum Physics, Flatiron Institute, New York, New York 10010, USA — 3MPSD, CFEL, Hamburg
K3C60 exhibits unconventional s-wave superconductivity with a critical temperature of approximately 20K, where the superconducting state emerges from a balance between strong electronic correlations and Jahn-Teller phonon-mediated pairing [1].
Recent pump-probe measurements have shown that optical excitation induces optical signatures reminiscent of the equilibrium superconducting state at temperatures higher than Tc [2, 3]. Notably, a 10 THz resonance was observed to trigger metastable superconducting-like properties that persist for temperatures up to 300 K [4].
The mechanism underlying this non-equilibrium superconducting state remains poorly understood. To address this question, we investigate a driven three-orbital Hubbard-Kanamori model which serves as a minimal model for equilibrium superconductivity in K3C60 using numerical techniques including exact diagonalization and tensor networks.
[1] Nomura, Y., et al. (2015). Science Advances, 1
[2] Mitrano, M. et al. (2016). Nature, 530, 461–464.
[3] Budden, M. et al. (2021). Nature Physics, 17, 611–618.
[4] Rowe, E. et al. (2023). Nature Physics, 19, 1821–1826.
Keywords: Light-induced superconductivity; Strongly correlated systems; Unconventional superconductivity