Role of Zhang-Rice singletlike excitations in one-dimensional cuprates

Article

关键词: MAGNETIC-SUSCEPTIBILITY;    SR2CUO3;    LA2CUO4;    TEMPERATURE;    SYSTEMS;   

DOI  :  10.1103/PhysRevB.61.9871

来源: SCIE

【 摘 要 】

We present a calculation of the electron-energy loss spectrum of infinite one-dimensional undoped CuO3 chains within a multiband Hubbard model. The results show good agreement with experimental spectra of Sr2CuO3. The main feature in the spectra is found to be due to the formation of Zhang-Rice singlet-like excitations, The q dependence of these excitations is a consequence of the inner structure of the Zhang-Rice singlet. This makes the inclusion of the oxygen degrees of freedom essential for the description of the relevant excitations. We observe that no enhanced intersite Coulomb repulsion is necessary to explain the experimental data.

【 授权许可】

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