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O: Fachverband Oberflächenphysik
O 38: Ultrafast electron dynamics at surface and interfaces II
O 38.8: Vortrag
Dienstag, 10. März 2026, 12:15–12:30, TRE/MATH
Understanding resonantly enhanced light-induced superconductivity in K3C60 — •Michael A. Sentef1,2, Juan I. Aranzadi1, Paul Fadler1, and Joseph Tindall3 — 1Institute for Theoretical Physics, University of Bremen — 2Max Planck Institute for the Structure and Dynamics of Matter, Hamburg — 3Center for Computational Quantum Physics, The Flatiron Institute, New York
Light-induced superconducting-like responses have been observed in K3C60 when driving with mid-infrared laser pulses [1], with a pronounced 10 THz resonance reported more recently [2]. Here we address the microscopic origin of this resonance. Using numerical calculations on finite clusters for a realistic multi-orbital model of K3C60 we simulate the effect of a periodic drive on the strongly correlated system. We find a sharp enhancement of pairing correlations when the drive frequency is tuned close to 10 THz, in agreement with experiment. The microscopic origin of this enhancement and its potential implications for a light-induced hidden phase [3] will be discussed. Our results thus provide a microscopic explanation for the resonantly enhanced light-induced superconducting-like state in K3C60 and strengthen its interpretation as being closely connected to superconducting pairing rather than to purely optical or nonthermal population effects.
[1] Mitrano et al., Nature 530, 461-464 (2016). [2] Rowe et al., Nature Physics 19, 1821-1826 (2023). [3] Budden et al., Nature Physics 17, 611-618 (2021).
Keywords: Light-induced superconductivity; Photo-induced phase transitions; Nonequilibrium dynamics; Pump-probe spectroscopy