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Y1−xPrxBa2Cu3O7: Charge redistribution between planes and chains?

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Abstract

A qualitative discussion is given of the electronic structure and properties of the system Y1−x Pr x Ba2Cu3O7 in which there is a transition from a high-T c superconductor to a magnetic insulator. To reconcile the apparently contradicting experimental data, it is suggested that the progressive hole redistribution between CuO2 planes and chains occurs with increasingx so that for large Pr content all the holes are in chains and none remain in planes. In this picture one can naturally explain the main properties of this system; notably, one gets an insulating state for pure PrBa2Cu3O7, the valence of Pr being still Pr3+. Many other properties of Y1−x Pr x Ba2Cu3O7−δ are naturally explained as well, and several predictions are made.

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Khomskii, D. Y1−xPrxBa2Cu3O7: Charge redistribution between planes and chains?. J Supercond 6, 69–73 (1993). https://doi.org/10.1007/BF00617803

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