Dynamical density matrix renormalization group study of photoexcited states in one-dimensional Mott insulators

Abstract

One-dimensional Mott insulators exhibit giant nonlinear optical response. Based on the dynamical density matrix renormalization group method, photoexcited states and optical response in the insulators are studied as functions of the on-site and the nearest neighbor Coulomb interactions, $U$ and $V$, respectively. We find that the lowest optically-allowed and forbidden excited states, which have odd and even parities, respectively, are degenerate for $V/t\ltsim 2$ with $t$ being the hopping integral of an electron between nearest neighbor sites. For $V/t\gtsim 2$, the bound states with even and odd parities occur and are not degenerate. The nature of the degeneracy and its effect on the optical response are examined.

arXiv comment5 pages, 3 figures, to be published in Phys. Rev. B

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Cited by in corpus (13)

• Nonequilibrium steady states of electric-field driven Mott insulators
• Transport properties of the one-dimensional Hubbard model at finite temperature
• Enhanced charge order in a photoexcited one-dimensional strongly correlated system
• Photoinduced charge and spin dynamics in strongly correlated electron systems
• Photo-induced nonequilibrium states in Mott insulators
• Photo-induced Tomonaga-Luttinger-like liquid in a Mott insulator
• Density matrix renormalization group study of optical conductivity in the one-dimensional Mott insulator Sr_2CuO_3
• Time and momentum-resolved tunneling spectroscopy of pump-driven non-thermal excitations in Mott insulators
• Excitonic effect on optical response in one-dimensional two-band Hubbard model
• Low-temperature density matrix renormalization group using regulated polynomial expansion
• Enhancement of phonon effects in photoexcited states of one-dimensional Mott insulators
• Pump-probe spectroscopy of the one-dimensional extended Hubbard model at half filling
• Double-Pulse Deexcitations in a One-Dimensional Strongly Correlated System