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High Temperature Superconductivity in Strongly Correlated Electronic Systems
London South Bank University, UK.
Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry - Ångström, Theoretical Chemistry. Uppsala University. (Zero Energy Universe Scenario)ORCID iD: 0000-0001-5788-7982
University of Sussex, UK.
2017 (English)In: Advances in Quantum Chemistry, ISSN 0065-3276, E-ISSN 2162-8815, Vol. 74, p. 183-208Article in journal (Refereed) Published
Abstract [en]

In this paper, we give a selective review of our work on the role of electron correlation in the theory of high-temperature superconductivity. The question of how electronic repulsions might give rise to off-diagonal long-range order (ODLRO) in high-temperature superconductors is currently one of the key questions in the theory of condensed matter. This paper argues that the key to understanding the occurrence of high-temperature superconductivity (HTSC) in cuprates is to be found in the Bohm-Pines Hamiltonian modified to include a polarizable dielectric background. The approach uses reduced electronic density matrices and discusses how these can be used to understand whether ODLRO giving rise to superconductivity might arise from a Bohm-Pines type potential which is comprised of a weak long-range attractive tail and a much stronger short-range repulsive Coulomb interaction. This allows time-reversed electron pairs to undergo a superconducting condensation on alternant Cuprate lattices. Thus, a detailed summary is given of the arguments that such interacting electrons can cooperate to produce a superconducting state in which time-reversed pairs of electrons effectively avoid the repulsive hard-core of the inter-electronic Coulomb interaction but reside on average in the attractive well of the effective potential. In a superconductor, the plasma wave function becomes the longitudinal component of a massive photon by the Anderson-Higgs mechanism. The alternant cuprate lattice structure is the key to achieving HTSC in cuprates with dx2-y2 symmetry condensate symmetry.

Place, publisher, year, edition, pages
2017. Vol. 74, p. 183-208
National Category
Theoretical Chemistry
Research subject
Chemistry with specialization in Chemical Physics
Identifiers
URN: urn:nbn:se:uu:diva-337583DOI: 10.1016/bs.aiq.2016.06.003OAI: oai:DiVA.org:uu-337583DiVA, id: diva2:1170257
Available from: 2018-01-02 Created: 2018-01-02 Last updated: 2018-01-03Bibliographically approved

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