Please use this identifier to cite or link to this item: http://hdl.handle.net/10995/102505
Title: Perspectives of disproportionation driven superconductivity in strongly correlated 3d compounds
Authors: Moskvin, A. S.
Issue Date: 2013
Citation: Moskvin A. S. Perspectives of disproportionation driven superconductivity in strongly correlated 3d compounds / A. S. Moskvin. — DOI 10.1088/0953-8984/25/8/085601 // Journal of Physics Condensed Matter. — 2013. — Vol. 25. — Iss. 8. — 085601.
Abstract: Disproportionation in 3d compounds can give rise to an unconventional electron-hole Bose liquid with a very rich phase diagram, from a Bose metal, to a charge ordering insulator and an inhomogeneous Bose-superfluid. Optimal conditions for disproportionation driven high-Tc superconductivity are shown to be realized only for several Jahn-Teller dn configurations that permit the formation of well defined local composite bosons. These are the high-spin d4, low-spin d7, and d 9 configurations given the octahedral crystal field, and the d 1, high-spin d6 configurations given the tetrahedral crystal field. The disproportionation reaction has a peculiar 'anti-Jahn-Teller' character lifting the bare orbital degeneracy. Superconductivity in the d 4 and d6 systems at variance with d1, d 7, and d9 systems implies unavoidable coexistence of the spin-triplet composite bosons and the magnetic lattice. We argue that unconventional high-Tc superconductivity, observed in quasi-2d cuprates with tetragonally distorted CuO6 octahedra and iron-based layered pnictides/chalcogenides with tetrahedrally coordinated Fe2+ ions presents a key argument to support the fact that the disproportionation scenario is at work in these compounds. © 2013 IOP Publishing Ltd.
Keywords: BOSE LIQUIDS
CHARGE ORDERING
COMPOSITE BOSONS
CRYSTAL FIELDS
CUPRATES
DISPROPORTIONATION REACTIONS
DISPROPORTIONATIONS
ELECTRON HOLE
HIGH-T
IRON-BASED
JAHN-TELLER
MAGNETIC LATTICE
OCTAHEDRAL CRYSTAL FIELDS
OPTIMAL CONDITIONS
ORBITAL DEGENERACY
PNICTIDES
BOSE-EINSTEIN CONDENSATION
BOSONS
COPPER COMPOUNDS
JAHN-TELLER EFFECT
PHASE DIAGRAMS
THREE DIMENSIONAL COMPUTER GRAPHICS
SUPERCONDUCTIVITY
CHALCOGEN
COPPER
CUPRIC OXIDE
IRON
ARTICLE
CHEMICAL MODEL
CHEMISTRY
COMPUTER SIMULATION
ELECTRIC CONDUCTIVITY
ELECTRON
ELECTRON SPIN RESONANCE
MAGNETISM
CHALCOGENS
COMPUTER SIMULATION
COPPER
ELECTRIC CONDUCTIVITY
ELECTRON SPIN RESONANCE SPECTROSCOPY
ELECTRONS
IRON
MAGNETICS
MODELS, CHEMICAL
URI: http://hdl.handle.net/10995/102505
Access: info:eu-repo/semantics/openAccess
SCOPUS ID: 84873311941
PURE ID: 908353
e387a2ca-52a7-4b0d-b52d-92a10a192442
ISSN: 9538984
DOI: 10.1088/0953-8984/25/8/085601
Appears in Collections:Научные публикации, проиндексированные в SCOPUS и WoS CC

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