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  • Title: Mott gap excitations and resonant inelastic x-ray scattering in doped cuprates.
    Author: Tsutsui K, Tohyama T, Maekawa S.
    Journal: Phys Rev Lett; 2003 Sep 12; 91(11):117001. PubMed ID: 14525453.
    Abstract:
    Predictions are made for the momentum- and carrier-dependent degradation of the Mott gap upon doping in high-T(c) cuprates as would be observed in Cu K-edge resonant inelastic x-ray scattering (RIXS). The two-dimensional Hubbard model with second- and third-nearest-neighbor hopping terms has been studied by numerical exact diagonalization. Special emphasis is placed on the particle-hole asymmetry of the Mott gap excitations. We argue that the Mott gap excitations observed by RIXS are significantly influenced by the interaction between charge carriers and antiferromagnetic correlations.
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