2001•Physical review. B, Condensed matterOpen access

Optical response in one-dimensional Mott insulators

S. S. Kancharla, C. J. Bolech

Abstract

We study the optical response of a Mott Hubbard system in the framework of the half--filled extended Hubbard model using the density matrix renormalization group (DMRG) method. We discuss the appearance of excitonic features inside the spectral gap as the system goes from the spin density wave (SDW) to the charge density wave (CDW) phase.

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Key concepts: Density matrix renormalization group, Hubbard model, Condensed matter physics, Mott insulator, Charge density wave, Physics, Spin density wave, Spin density