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Prediction of the in-Gap States Above the Top of the Valence Band in the Undoped Insulating Cuprates due to Spin-Polaron Effect

S. G. Ovchinnikov·A. A. Borisov·V. A. Gavrichkov·M. M. Korshunov
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Abstract

In the framework of the generalized tight binding method we have calculated the quasiparticle band structure and the spectral functions of the undoped cuprates like $La_2 CuO_4$, $Sr_2CuO_2Cl_2$ etc. Due to spin fluctuations the in-gap state appears above the top of the valence band in the undoped antiferromagnetic insulator similar to in-gap states induced by hole doping. In the ARPES experiments the in-gap states can be detected as weak low energy satellites.

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S. G. Ovchinnikov, A. A. Borisov, V. A. Gavrichkov, M. M. Korshunov. 2003-10-20. Prediction of the in-Gap States Above the Top of the Valence Band in the Undoped Insulating Cuprates due to Spin-Polaron Effect. https://doi.org/10.1088/0953-8984%2F16%2F8%2Fl04

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