Competing orders in an extended Falicov-Kimball model

Subhasree Pradhan ()
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Subhasree Pradhan: The Ohio State University

The European Physical Journal B: Condensed Matter and Complex Systems, 2019, vol. 92, issue 10, 1-5

Abstract: Abstract We study the interplay between superconducting pairing, exciton and charge-density wave in a correlated electron model, the Falicov-Kimball model, extended by a hybridization term between spinless fermions and also by an attractive pairing in the particle channel. A self-consistent Hartree-Fock BdG mean-field calculation shows that the hybridization V and Coulomb repulsion U favour in binding an exciton but both are detrimental to the formation of superconducting pairing, whereas, CDW is favoured by Coulomb interaction and disfavoured by V . There is a coexistence regime for superconductivity, CDW and excitonic order in the parameter space. Graphical abstract

Keywords: Solid; State; and; Materials (search for similar items in EconPapers)
Date: 2019
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DOI: 10.1140/epjb/e2019-100296-5

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