Photo-induced Tomonaga-Luttinger-like liquid in a Mott insulator

Details Photo-induced Tomonaga-Luttinger-like liquid in a Mott insulator Photo-induced Tomonaga-Luttinger-like liquid in a Mott insulator

2008-09-09

arxiv.org/abs/0809.1475v2

Phys. Rev. B 78, 241104 (R) (2008)

Physics

Condensed Matter

Strongly Correlated Electrons

5 pages, 5 figures

Scientific paper

10.1103/PhysRevB.78.241104

Photo-induced metallic states in a Mott insulator are studied for the half-filled, one-dimensional Hubbard model with the time-dependent density matrix renormalization group. An irradiation of strong AC field is found to create a linear dispersion in the optical spectrum (current-current correlation) in the nonequilibrium steady state reminiscent of the Tomonaga-Luttinger liquid for the doped Mott insulator in equilibrium. The spin spectrum in nonequilibrium retains the des Cloizeaux-Pearson mode with the spin velocity differing from the charge velocity. The mechanism of the photocarrier-doping, along with the renormalization in the charge velocity, is analyzed in terms of an effective Dirac model.

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