Excitons in Mott insulators

Abstract

Motivated by recent Raman and resonant inelastic X-ray scattering experiments performed for Mott insulators, which suggest formation of excitons in these systems, we present a theory of exciton formation in the upper Hubbard band. The analysis based on the spin polaron approach is performed in the framework of an effective t-J model for the subspace of states with one doubly occupied site. Our results confirm the existence of excitons and bear qualitative resemblance to experimental data despite some simplifications in our approach. They prove that the basic underlying mechanismof exciton formation is the same as that which gives rise to binding of holes in weakly doped antiferromagnets.

4 pages, 1 figure

References in corpus (1)

• Electronic Structure of Mott Insulators Studied by Inelastic X-ray Scattering

Cited by in corpus (23)

• Ultrafast charge recombination in photoexcited Mott-Hubbard insulator
• Generic optical excitations of correlated systems: $\pi$-tons
• Hubbard exciton revealed by time-domain optical spectroscopy
• Mott-Hubbard exciton in the optical conductivity of YTiO3 and SmTiO3
• Charge-transfer exciton in La2CuO4 probed with resonant inelastic x-ray scattering
• Probing orbital fluctuations in RVO3 (R = Y, Gd, or Ce) by ellipsometry
• Influence of spin and orbital fluctuations on Mott-Hubbard exciton dynamics in LaVO${}_3$ Thin Films
• Mott-moiré excitons
• Excitons and Dark Fermions as Origins of Mott Gap, Pseudogap and Superconductivity in Cuprate Superconductors --- General Idea and Basic Concept Based on Gap Physics
• A Hubbard exciton fluid in a photo-doped antiferromagnetic Mott insulator
• Spin-Mediated Mott Excitons
• Symmetry of Photoexcited States and Large-Shift Raman Scattering in Two-Dimensional Mott Insulators
• Landscape of coexisting excitonic states in the insulating single-layer cuprates and nickelates
• Inelastic x-ray scattering as a probe of electronic correlations
• Temperature and Dimensionality Dependences of Optical Absorption Spectra in Mott Insulators
• Dispersion of the dielectric function of a charge-transfer insulator
• Observation of excitons bound by antiferromagnetic correlations
• Diagnosing electronic phases of matter using photonic correlation functions
• Displaced Drude peak from $\pi$-ton vertex corrections
• Broadening and sharpening of the Drude peak through antiferromagnetic fluctuations
• Distinct charge and spin recovery dynamics in a photo-excited Mott insulator
• Tracking the local order parameter through the Hubbard exciton decoherence time in the Mott-Hubbard insulator LaVO3
• Photoemission Signatures of Photoinduced Carriers and Excitons in One-Dimensional Mott Insulators