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

Abstract

The electronic structure of Mott insulators continues to be a major unsolved problem in physics despite more than half-century of intense research efforts. Well-developed momentum-resolved spectroscopies such as photoemission or neutron scattering cannot probe the full Mott gap. We report observation of dispersive charge excitations across the Mott gap in a high Tc parent cuprate Ca2CuO2Cl2 using high resolution resonant inelastic x-ray scattering shedding light on the anisotropy of Mott-gap. The results provide direct support for the Hubbard model to describe charge excitations across the Mott gap.

5 pages, 4 figures, Revised

References in corpus (5)

• Photoemission Evidence for a Remnant Fermi Surface and d-Wave-Like Dispersion in Insulating Ca2CuO2Cl2
• Resonant Inelastic X-Ray Scattering from Valence Excitations in Insulating Copper-Oxides
• Momentum Dependence of Resonant Inelastic X-Ray Scattering Spectrum in Insulating Cuprates
• Momentum-Dependent Charge Transfer Excitations in Sr2CuO2Cl2 - Angle Resolved Electron Energy Loss Spectroscopy
• Excitons in insulating cuprates

Cited by in corpus (95)

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