Hybridization fluctuations in the half-filled periodic Anderson model

Danqing Hu, Jian-Jun Dong, and Yi-feng Yang
Phys. Rev. B 100, 195133 – Published 20 November 2019

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 quantum 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 hybridization fluctuations as proposed in a recent ultrafast optical pump-probe experiment. The Kondo insulating state is only established at lower temperatures with the development of sufficiently strong intersite 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.

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  • Received 4 September 2019
  • Revised 7 November 2019

DOI:https://doi.org/10.1103/PhysRevB.100.195133

©2019 American Physical Society

Physics Subject Headings (PhySH)

Condensed Matter, Materials & Applied Physics

Authors & Affiliations

Danqing Hu1,2, Jian-Jun Dong1,2, and Yi-feng Yang1,2,3,*

  • 1Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
  • 2University of Chinese Academy of Sciences, Beijing 100049, China
  • 3Songshan Lake Materials Laboratory, Dongguan, Guangdong 523808, China

  • *yifeng@iphy.ac.cn

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Vol. 100, Iss. 19 — 15 November 2019

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