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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Date
2015-04
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Springer US, 233 Spring St, New York, NY 10013 USA
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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).
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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)