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Superconductivity from Repulsive Electronic Correlations on Alternant Cuprate and Iron-Based Lattices
Imperial College London.
Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry - Ångström, Theoretical Chemistry. (Erkki Brändas)
2013 (English)In: International Journal of Quantum Chemistry, ISSN 0020-7608, E-ISSN 1097-461X, Vol. 113, no 17, 2053-2059 p.Article in journal (Refereed) Published
Abstract [en]

A key question in the theory of high-temperature superconductivityis whether off-diagonal long-range order can beinduced wholly or in large part by repulsive electronic correlations. Electron pairs on cuprate and the iron-based pnictide and chalcogenide alternant lattices may interact with a strong shortrange Coulomb repulsion and much weaker longer range attractive tail. Here, we show that such interacting electrons can cooperate to produce a superconducting state in which time reversed electron pairs effectively avoid the repulsive part but reside predominantly in the attractive region of the potential. The alternant lattice structure is a key feature of such a stabilization mechanism leading to the occurrence of high-temperature superconductivity with dx2y2 or sign alternating s-wave or s-condensate symmetries

Place, publisher, year, edition, pages
New York: John Wiley & Sons, 2013. Vol. 113, no 17, 2053-2059 p.
National Category
Physical Sciences
Research subject
Physics with specialization in Quantum Chemistry
URN: urn:nbn:se:uu:diva-214550DOI: 10.1002/qua.24437OAI: oai:DiVA.org:uu-214550DiVA: diva2:685033
Available from: 2014-01-08 Created: 2014-01-08 Last updated: 2014-01-15Bibliographically approved

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