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Please use this identifier to cite or link to this item: https://dspace.lboro.ac.uk/2134/1305

Title: Charge redistribution and properties of high-temperature superconductors
Authors: Khomskii, D.I.
Kusmartsev, F.V.
Issue Date: 1992
Publisher: © American Physical Society
Citation: KHOMSKII and KUSMARTSEV, 1992. Charge redistribution and properties of high-temperature superconductors. Physical Review B, 46(21), pp. 14245–14248
Abstract: We show that in high-Tc superconductors (HTSC) with two groups of electrons (e.g., holes in CuO2 planes and in a ‘‘reservoir’’) there should exist a charge redistribution with the temperature: the hole concentration Nh in ‘‘active’’ superconducting CuO2 planes increases below Tc. This effect may explain structural changes such as the shift of the apical oxygen atom, anomalous thermal expansion, the shift of nuclear quadrupole resonance lines, the change of the positron lifetime, and the modification of the ion channeling below Tc. Some other possible consequences of the charge redistribution (the modification of the temperature dependence of a gap Δ and of the ratio 2Δ0/Tc, the phenomena at a contact of HTSC with normal metals and semiconductors) are discussed. We show that in high-Tc superconductors (HTSC) with two groups of electrons (e.g., holes in CuO2 planes and in a ‘‘reservoir’’) there should exist a charge redistribution with the temperature: the hole concentration Nh in ‘‘active’’ superconducting CuO2 planes increases below Tc. This effect may explain structural changes such as the shift of the apical oxygen atom, anomalous thermal expansion, the shift of nuclear quadrupole resonance lines, the change of the positron lifetime, and the modification of the ion channeling below Tc. Some other possible consequences of the charge redistribution (the modification of the temperature dependence of a gap Δ and of the ratio 2Δ0/Tc, the phenomena at a contact of HTSC with normal metals and semiconductors) are discussed.
Description: This article has been published in the journal, Physical Review B [© American Physical Society]. It is also available at: http://link.aps.org/abstract/PRB/v46/p14245.
URI: https://dspace.lboro.ac.uk/2134/1305
ISSN: 0556-2805
Appears in Collections:Published Articles (Physics)

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