Monte Carlo study of phase separation in magnetic insulators
| dc.contributor.author | Murawski, Szymon | |
| dc.contributor.author | Kapcia, Konrad Jerzy | |
| dc.contributor.author | Pawłowski, Grzegorz | |
| dc.contributor.author | Robaszkiewicz, Stanisław | |
| dc.date.accessioned | 2015-05-20T16:29:20Z | |
| dc.date.available | 2015-05-20T16:29:20Z | |
| dc.date.issued | 2015-02 | |
| dc.description | This is an author-created, un-copyedited version of an article accepted for publication in Acta Physica Polonica A. | pl_PL |
| dc.description.abstract | In this work we focus on the study of phase separation in the zero-bandwidth extended Hubbard with nearest-neighbors intersite Ising-like magnetic interactions $J$ and on-site Coulomb interactions U. The system has been analyzed by means of Monte Carlo simulations (in the grand canonical ensemble) on two dimensional square lattice (with N=LxL=400 sites) and the results for U/(4J)=2 as a function of chemical potential and electron concentration have been obtained. Depending on the values of interaction parameters the system exhibits homogeneous (anti-)ferromagnetic (AF) or non-ordered (NO) phase as well as phase separation PS:AF/NO state. Transitions between homogeneous phases (i.e. AF-NO transitions) can be of first or second order and the tricritical point is also present on the phase diagrams. The electron compressibility $K$ is an indicator of the phase separation and that quantity is of particular interest of this paper. | pl_PL |
| dc.description.sponsorship | 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 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; The Fundation of Adam Mickiewicz University in Poznań | pl_PL |
| dc.identifier.citation | Acta Physica Polonica A, Vol. 121, No. 2, 281-284 (2015) | pl_PL |
| dc.identifier.doi | https://doi.org/10.12693/APhysPolA.127.281 | |
| dc.identifier.issn | 0587-4246 | |
| dc.identifier.uri | http://hdl.handle.net/10593/13047 | |
| dc.language.iso | en | pl_PL |
| dc.publisher | Polish Academy of Sciences, Institute of Physics, al. Lotników 32-46, PL-02-668 Warsaw, Poland | pl_PL |
| dc.rights | info:eu-repo/semantics/openAccess | pl_PL |
| dc.subject | extended Hubbard model | pl_PL |
| dc.subject | atomic limit | pl_PL |
| dc.subject | magnetism | pl_PL |
| dc.subject | phase separation | pl_PL |
| dc.subject | Monte Carlo simulations | pl_PL |
| dc.title | Monte Carlo study of phase separation in magnetic insulators | pl_PL |
| dc.type | Artykuł | pl_PL |
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