Doping of a One-Dimensional Mott Insulator: Photoemision and Optical Studies of Sr${}_2$CuO${}_{3+\delta }$

Abstract

The spectral properties of a one-dimensional (1D) single-chain Mott insulator Sr${}_2$CuO${}_3$ have been studied in angle-resolved photoemission and optical spectroscopy, at half filling and with small concentrations of extra charge doped into the chains via high oxygen pressure growth. The single- particle gap is reduced with oxygen doping, but the metallic state is not reached. The bandwidth of the charge-transfer band increases with doping, while the state becomes narrower, allowing unambiguous observation of separated spinon and holon branches in the doped system. The optical gap is not changed upon doping, indicating that a shift of chemical potential rather than decrease of corelation gap is responsible for the apparent reduction of the photoemission gap.

arXiv comment4 pages, 2 figures

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Cited by in corpus (12)

• Finite temperature dynamics of the Mott insulating Hubbard chain
• Effective Hamiltonian for the electronic properties of the quasi-one-dimensional material Li0.9Mo6O17
• Time and momentum-resolved tunneling spectroscopy of pump-driven non-thermal excitations in Mott insulators
• Pseudoparticle approach to 1D integrable quantum models
• Boundary effects on the local density of states of one-dimensional Mott insulators and charge density wave states
• Bound Excitons in Sr${}_2$CuO${}_3$
• Beyond perturbation theory: A time-dependent approach to inelastic scattering spectroscopies in- and away from equilibrium
• Spin-charge decoupling and the photoemission line-shape in one dimensional insulators
• Effective interaction in a non-Fermi liquid conductor and spin correlations in under-doped cuprates
• Ultrafast X-ray Absorption Spectroscopy of Strongly Correlated Systems: Core Hole Effect
• Optical excitations in Sr${}_2$CuO${}_3$
• Possibility of hole confinement in the weak coupling regime of one dimensional ising antiferromagnet and the emergence of spin-charge separation in the bulk limit