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  • Letter
  • Open Access

Glassy dynamics of the one-dimensional Mott insulator excited by a strong terahertz pulse

Kazuya Shinjo1,2, Shigetoshi Sota3, and Takami Tohyama1

  • 1Department of Applied Physics, Tokyo University of Science, Tokyo 125-8585, Japan
  • 2Computational Quantum Matter Research Team, RIKEN Center for Emergent Matter Science (CEMS), Wako, Saitama 351-0198, Japan
  • 3Computational Materials Science Research Team, RIKEN Center for Computational Science (R-CCS), Kobe, Hyogo 650-0047, Japan

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Phys. Rev. Research 4, L032019 – Published 3 August, 2022

DOI: https://doi.org/10.1103/PhysRevResearch.4.L032019

Abstract

The elucidation of nonequilibrium states in strongly correlated systems holds the key to emergence of novel quantum phases. The nonequilibrium-induced insulator-to-metal transition is particularly interesting since it reflects the fundamental nature of competition between itinerancy and localization of the charge degrees of freedom. We investigate pulse-excited insulator-to-metal transition of the half-filled one-dimensional extended Hubbard model. Calculating the time-dependent optical conductivity with the time-dependent density-matrix renormalization group, we find that strong mono- and half-cycle pulses inducing quantum tunneling strongly suppress spectral weights contributing to the Drude weight σD, even if we introduce a large number of carriers Δnd. This is in contrast to a metallic behavior of σD∝Δnd induced by photon absorption and chemical doping. The strong suppression of σD in quantum tunneling is a result of the emergence of the Hilbert-space fragmentation, which makes pulse-excited states glassy.

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Phys. Rev. Research 4, L032019– Published 3 August, 2022
  • Received 9 February 2022
  • Revised 15 May 2022
  • Accepted 18 July 2022
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