Please use this identifier to cite or link to this item: https://hdl.handle.net/10593/13046
Title: Electron phase separations involving superconductivity in the extended Hubbard models with pair hopping interaction
Authors: Kapcia, Konrad Jerzy
Keywords: extended Hubbard model
atomic limit
superconductivity
charge-order
magnetism
phase separation
mean-field approximation
pair hopping
Issue Date: Feb-2015
Publisher: Polish Academy of Sciences, Institute of Physics, al. Lotników 32-46, PL-02-668 Warsaw, Poland
Citation: Acta Physica Polonica A, Vol. 121, No. 2, 204-206 (2015)
Abstract: In this work the extended Hubbard models with pair hopping interaction (at the atomic limit) are investigated within the variational approach, which treats the on-site interaction term exactly and the intersite interactions within the mean-field approximation (exact in $d\rightarrow+\infty$). We analyze mutual stability of the superconducting (SC) phase and charge (CO) or (ferro/antiferro-)magnetic (M) orderings as well as homogeneous mixed phases. Our preliminary results for U=0 show that the SC phase can coexist with the CO or M phases only in states with electron phase separation.
Sponsorship: National Science Center (NCN) as a research project in years 2011-2013, under grant No. DEC-2011/01/N/ST3/00413; National Science Center (NCN) as a doctoral scholarship in years 2013-2014 No. DEC- 2013/08/T/ST3/00012; 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"
Description: This is an author-created, un-copyedited version of an article accepted for publication in Acta Physica Polonica A.
URI: http://hdl.handle.net/10593/13046
DOI: 10.12693/APhysPolA.127.204
ISSN: 0587-4246
Appears in Collections:Artykuły naukowe (WF)

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