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arXiv · 1811.12334

Ultrafast Laser Driven Many-Body Dynamics and Kondo Coherence Collapse

W. Zhu·Benedikt Fauseweh·Alexis Chacon·Jian-Xin Zhu
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Abstract

Ultrafast laser pulse has provided a systematic way to inspect the dynamics of electrons in condensed matter systems. In this paper, by means of time-dependent density matrix renormalization group, we study an ultrafast laser driven Kondo lattice model, in which conduction electrons are strongly coupled with magnetically local moments. The single-particle spectral function due to strong correlation effects and photon emission in the non-equilibrium states under laser driving are calculated. We find laser field excited collective doublon-hole pairs and an associated transient melting of Kondo coherence phase, signifying the collapse of Kondo energy gap. Moreover, we show that the photon emission, induced by a strong laser field, exhibits a different intensity characteristics than in the equilibrium Kondo insulator, which could be explained by the Kondo collapse and related suppression of both intra-band and inter-band contribution in Kondo melting liquid. These theoretical insight is accessible with time- and angle-resolved photoemission spectroscopy and high-harmonic generation spectroscopy, and will stimulate the investigation of nonequilibrium dynamics and nonlinear phenomenon in heavy fermion systems.

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W. Zhu, Benedikt Fauseweh, Alexis Chacon, Jian-Xin Zhu. 2018-11-29. Ultrafast Laser Driven Many-Body Dynamics and Kondo Coherence Collapse. https://doi.org/10.1103/physrevb.103.224305

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