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Charge redistribution and properties of high-temperature superconductors
journal contribution
posted on 2006-04-27, 11:29 authored by D.I. Khomskii, F.V. KusmartsevWe 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.
History
School
- Science
Department
- Physics
Pages
757478 bytesCitation
KHOMSKII and KUSMARTSEV, 1992. Charge redistribution and properties of high-temperature superconductors. Physical Review B, 46(21), pp. 14245–14248Publisher
© American Physical SocietyPublication date
1992Notes
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.ISSN
0556-2805Language
- en