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 Plus annual

Presents the access of premium content as premium feature

Premium Content

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 annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

The two-orbital Hubbard model on a square lattice at quarter filling(electron number per site $n=1$) is investigated by the variational Monte Carlomethod. For the variational wave function, we include short-range doublon-holonbinding factors. We find that the energy of this wave function is lower thanthat of the density-density Jastrow wave function partially includinglong-range correlations used in a previous study. We introduce frustration tothe model by the next-nearest-neighbor hopping $t'$ in addition to thenearest-neighbor hopping $t$. For $t'=0$, a ferromagnetic state with staggeredorbital order occurs by increasing the Coulomb interaction $U$ before the Motttransition takes place. By increasing $t'$, the region of this ferromagneticphase shrinks, and the Mott transition without magnetic order occurs.

Destabilization of ferromagnetism by frustration and realization of a nonmagnetic Mott transition in the quarter-filled two-orbital Hubbard model