Optical excitations in Sr${}_2$CuO${}_3$

Abstract

We investigated excitation spectra of the one-dimensional chain compound Sr${}_2$CuO${}_3$. The small peak at 2.3 eV in the loss function was turned to correspond to the strong charge transfer transition at 1.8 eV in conductivity. It has the excitonic character expected in one dimensional extended Hubbard model of the transition from the lower Hubberd band to the Zhang-Rice singlet state. The strongest peak at 2.7 eV in the loss function is attributed to the continuum excitation of the excitonic charge transfer transition. The spectral weight sum rule is satisfied within these transitions.

4 pages, 4 figures

References in corpus (8)

• Electronic States and Magnetic Propertis of Edge-sharing Cu-O Chains
• Manifestation of spin-charge separation in the dynamic dielectric response of one--dimensional Sr2CuO3
• Spin and charge dynamics of the one-dimensional extended Hubbard model
• Temperature dependent optical conductivity of undoped cuprates with weak exchange
• Excitonic effect on optical response in one-dimensional two-band Hubbard model
• Doping of a One-Dimensional Mott Insulator: Photoemision and Optical Studies of Sr${}_2$CuO${}_{3+\delta }$
• Enhancement of phonon effects in photoexcited states of one-dimensional Mott insulators
• Bound Excitons in Sr${}_2$CuO${}_3$

Cited by in corpus (1)

• Quantum control of Hubbard excitons