Photoinduced in-gap excitations in the one-dimensional extended Hubbard model

Abstract

We investigate the time evolution of optical conductivity in the half-filled one-dimensional extended Hubbard model driven by a transient laser pulse, by using the time-dependent Lanczos method. Photoinduced in-gap excitations exhibit a qualitatively different structure in the spin-density wave (SDW) in comparison to the charge-density-wave (CDW) phase. In the SDW, the origin of a low-energy in-gap excitation is attributed to the even-odd parity of the photoexcited states, while in the CDW an in-gap state is due to confined photogenerated carriers. The signature of the in-gap excitations can be identified as a characteristic oscillation in the time evolution of physical quantities.

5 pages, 4 figures

References in corpus (4)

• Optically induced superconductivity in striped La2-xBaxCuO4 by polarization-selective excitation in the near infrared
• Theory of time-resolved optical spectroscopy on correlated electron systems
• Enhanced charge order in a photoexcited one-dimensional strongly correlated system
• Theory for ultrafast nonequilibrium dynamics in d-wave superconductors

Cited by in corpus (9)

• Charge-density-wave melting in the one-dimensional Holstein model
• Photo-induced nonequilibrium states in Mott insulators
• Photo-enhanced excitonic correlations in a Mott insulator with nonlocal interactions
• Wannier-Stark ladders and Stark shifts of excitons in Mott insulators
• Pump-probe spectroscopy of the one-dimensional extended Hubbard model at half filling
• Anomalous suppression of photo-induced in-gap weight in the optical conductivity of a two-leg Hubbard ladder
• Controlling inversion and time-reversal symmetries by subcycle pulses in the one-dimensional extended Hubbard model
• A new pathway to impact ionization in a photo-excited one-dimensional ionic Hubbard model
• Low-energy photoexcitations inside the Mott gap in doped Hubbard and t-J ladders