Photoinduced correlated electron dynamics in a two-leg ladder Hubbard system

Abstract

Photoinduced carrier dynamics in a correlated electron system on a coupled two-leg ladder lattice are studied. The two-leg ladder Hubbard model is analyzed by utilizing the exact diagonalization method based on the Lanczos algorithm in finite size clusters. In order to reveal the transient carrier dynamics after photoirradiation, we calculate the low-energy components of the hole kinetic energy, the pair-field correlation function, the optical conductivity spectra and others. It is shown that the photoinduced metallic-like state appears in a half filled Mott insulating state, while the low-energy carrier motion is suppressed by photoirradiation in hole doped metallic states. These photoinduced changes in electron dynamics are associated with changes in the carrier-pair coherence, and are not attributed to a naive thermalization but to a ladder-lattice effect. Based on the numerical results, optical controls of hole pairs by using the double-pulse pumping are demonstrated. Implications to the recent optical pump-probe experiments are presented.

9 pages, 10 figures

References in corpus (8)

• Optically induced superconductivity in striped La2-xBaxCuO4 by polarization-selective excitation in the near infrared
• Photo-induced states in a Mott insulator
• Crossover between BCS Superconductor and Doped Mott Insulator of d-wave Pairing State in Two-Dimensional Hubbard Model
• Nonequilibrium quantum dynamics of a charge carrier doped into a Mott insulator
• Enhanced charge order in a photoexcited one-dimensional strongly correlated system
• Photoinduced in-gap excitations in the one-dimensional extended Hubbard model
• Nonequilibrium propagation and decay of a bound pair in driven t-J models
• Dynamics of doublon-holon pairs in Hubbard two-leg ladders

Cited by in corpus (15)

• Photoinduced $\eta$ Pairing in the Hubbard Model
• Nonequilibrium steady-state theory of photodoped Mott insulators
• Charge stiffness and long-range correlation in the optically induced $\eta$-pairing state of the one-dimensional Hubbard model
• Photoinduced electron-electron pairing in the extended Falicov-Kimball model
• Pulse excitation to continuous-wave excitation in a low-dimensional interacting quantum system
• Glassy dynamics of the one-dimensional Mott insulator excited by a strong terahertz pulse
• Impact ionization and multiple photon absorptions in the two-dimensional photoexcited Hubbard model
• Emergence and spectral-weight transfer of electronic states in the Hubbard ladder
• Anomalous suppression of photo-induced in-gap weight in the optical conductivity of a two-leg Hubbard ladder
• Photoinduced charge carrier dynamics in Hubbard two-leg ladders and chains
• Keldysh crossover in one-dimensional Mott insulators
• Photoinduced $\eta$-pairing correlation in the Hubbard ladder
• Optical absorption activated by an ultrashort half-cycle pulse in metallic and superconducting states of the Hubbard model
• Effect of phase string on single-hole dynamics in the two-leg Hubbard ladder
• Low-energy photoexcitations inside the Mott gap in doped Hubbard and t-J ladders