Superconductivity, charge orderings, magnetism, and their phase separations in the ground state of lattice models of superconductor with very short coherence length

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Abstract

We present the ground state results for lattice models of superconductor (SC) with extremely short coherence length, which also involve the interplay with charge (CO) and (anti-)ferromagnetic orderings. Our preliminary results at zero-temperature (derived by means of the variational approach which treats the on-site interaction term exactly and the intersite interactions within the mean-field approximation, exact in $d\rightarrow+\infty$), yields that the SC phase can coexist with the CO or magnetic (M) phases in states with electron phase separation (PS:SC/CO and PS:SC/M, respectively).

Description

This is an author-created, un-copyedited version of an article accepted for publication in Journal of Superconductivity and Novel Magnetism.

Sponsor

National Science Center (NCN) as a research project in years 2011-2013, under grant No. DEC-2011/01/N/ST3/00413; European Commission and Ministry of Science and Higher Education (Poland) - partial financial support from European Social Fund – Operational Programme "Human Capital" – POKL.04.01.01-00-133/09-00 – "Proinnowacyjne kształcenie, kompetentna kadra, absolwenci przyszłości"; National Science Center (NCN) as a doctoral scholarship in years 2013-2014, No. DEC- 2013/08/T/ST3/00012; The Fundation of Adam Mickiewicz University in Poznań

Keywords

extended Hubbard model, atomic limit, phase separation, superconductivity, magnetism, charge-order, pair hopping, phase diagrams

Citation

Journal of Superconductivity and Novel Magnetism, Vol. 28, No. 4, 1289-1294 (2015)

Seria

ISBN

ISSN

1557-1939

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Rights Creative Commons

Creative Commons License

Uniwersytet im. Adama Mickiewicza w Poznaniu
Biblioteka Uniwersytetu im. Adama Mickiewicza w Poznaniu
Ministerstwo Nauki i Szkolnictwa Wyższego