Hybridization fluctuations in the half-filled periodic Anderson model

Abstract

Motivated by recent photoemission and pump-probe experiments, we report determinant Quantum Monte Carlo simulations of hybridization fluctuations in the half-filled periodic Anderson model. A tentative phase diagram is constructed based solely on hybridization fluctuation spectra and reveals a crossover regime between an unhybridized selective Mott state and a fully hybridized Kondo insulating state. This intermediate phase exhibits nonlocal hybridization fluctuations and consequentially the so-called "band bending" and a direct hybridization gap as observed in angle-resolved photoemission spectroscopy and optical conductivity. This connects the band bending with the nonlocal hybridization fluctuations as proposed in latest ultrafast optical pump-probe experiment. The Kondo insulating state is only established at lower temperatures with the development of sufficiently strong inter-site hybridization correlations. Our work suggests a unified picture for interpreting recent photoemission, pump-probe, and optical observations and provides numerical evidences for the importance of hybridization fluctuations in heavy fermion physics.

arXiv comment6 pages, 4 figures

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• Hybridization dynamics in CeCoIn5 revealed by ultrafast optical spectroscopy
• Unveiling the Hybridization Process in a Quantum Critical Ferromagnet by Ultrafast Optical Spectroscopy
• Learned Optimizers for Analytic Continuation
• Mutual information, quantum phase transition, and phase coherence in Kondo systems
• Development of long-range phase coherence on the Kondo lattice
• Schwinger boson approach for the dynamical mean-field theory of the Kondo lattice
• An emerging global picture of heavy fermion physics
• Energy-scale cascade and correspondence between Mott and Kondo lattice physics
• One-dimensional moire charge density wave in the hidden order state of URu2Si2 induced by fracture
• Learning disentangled representation for classical models