Effect of external pressure on the normal and superconducting properties of high-T-c cuprates

Описание

Тип публикации: статья из журнала

Год издания: 2016

Идентификатор DOI: 10.1002/pssb.201552465

Ключевые слова: cuprates, electronic structure, Fermi surface, Lifshitz transitions, strongly correlated electrons, superconducting properties, Cuprates, Electronic structure, Fermi surface, Lifshitz transitions, Strongly correlated electrons, Superconducting properties

Аннотация: The pressure effects on the normal state electronic structure, the superexchange interaction, and the critical temperature of d-type superconductivity mediated by magnetic pairing have been studied within the multielectron hybrid scheme LDA+GTB that takes into account electron correlations in CuO (2) planes. We have found the changПоказать полностьюes of the multiband p-d model parameters at 3% compression of different symmetry: (i) hydrostatic, (ii) along the c-axis, and (iii) in a-b plane. We have studied the changes of the Fermi surface under external pressure for different hole doping concentration x. In general, this effect is too small except two critical concentrations x(c1) approximate to 0.15 and x(c2) = 0.24 where the Lifshitz transitions occur with the change of the Fermi surface topology. In the vicinity of the critical concentration, we have found the giant change of the Fermi surface area up to 100% related to the pressure-induced Lifshitz transition. The effects of pressure on the antiferromagnetic coupling J and the mean-field value of T-c are obtained in a good agreement to experimental data. (C) 2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim

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Издание

Журнал: PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS

Выпуск журнала: Vol. 253, Is. 3

Номера страниц: 486-493

ISSN журнала: 03701972

Место издания: WEINHEIM

Издатель: WILEY-V C H VERLAG GMBH

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