English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Tools annual

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Presents the access of premium content as premium feature

Premium Content

Global: Zendy Plus annual

Global: Zendy Free Plan

The critical behavior of a hybrid spin-electron model with localized Isingspins placed on nodal sites and mobile electrons delocalized over bonds betweentwo nodal lattice sites is analyzed by the use of a generalizeddecoration-iteration transformation. Our attention is primarily concentrated ona rigorous analysis of a critical temperature in canonical and grand-canonicalstatistical ensemble at two particular electron concentrations, correspondingto a quarter ($\rho\!=\!1$) and a half ($\rho\!=\!2$) filled case. It is foundthat the critical temperature of the investigated spin-electron system in thecanonical and grand-canonical ensemble may be remarkably different and is verysensitive to the competition among the model parameters like the electronhopping amplitude ($t$), the Ising coupling between the localized spins ($J'$),the electrostatic potential ($V$) and the electron concentration ($\rho$). Inaddition, it is detected that the increasing electrostatic potential has areduction effect upon the deviation between critical temperatures in bothstatistical ensembles.

acta physica polonica. a

Comparative Study of a Critical Behavior of a Coupled Spin-Electron  Model on a Doubly Decorated Square Lattice in the Canonical and  Grand-Canonical Ensemble