Abstract
An HTSC model, in which the interaction of valence-band electrons with diatomic negative U centers is assumed to be responsible for the anomalous properties of HTSC compounds, is proposed and used to explain the nature of the pseudogap and pseudogap anomalies (including the giant Nernst effect, the anomalous diamagnetism above T c, the “transfer” of the optical spectral weight). For YBa2Cu3O6 + δ, the pseudogap opening temperature T* and T c are calculated as functions of the degree of doping δ. The calculated dependences agree quantitatively with the experimental dependences without using scale fitting parameters. The good agreement between the calculated and experimental results can serve as an argument for the proposed HTSC model.
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Original Russian Text © K.V. Mitsen, O.M. Ivanenko, 2008, published in Zhurnal Éksperimental’noĭ i Teoreticheskoĭ Fiziki, 2008, Vol. 134, No. 6, pp. 1153–1166.
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Mitsen, K.V., Ivanenko, O.M. Possible nature of the pseudogap anomalies in HTSC. J. Exp. Theor. Phys. 107, 984–995 (2008). https://doi.org/10.1134/S106377610812008X
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DOI: https://doi.org/10.1134/S106377610812008X