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 Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

Phase behaviors of two-dimensional (2D) systems locate as a fundamental topicin condensed matter and statistical physics. Although hard polygons andinteractive point-like particles are well studied, the phase behaviors of morerealistic molecular systems containing intermolecular interaction and molecularshape remain elusive. Here we investigate by molecular dynamics simulationthermal stabilities of 2D ball-stick polygons, serving as simplified models formolecular systems. Below the melting temperature $T_{m}$, we identify acritical edge number $n_{c}$, at which a waving superlattice structure emerges;when n < $n_{c}$,the triangular system stabilizes at a spin-ice-like glassystate; when n > $n_{c}$,the polygons stabilize at crystalline states, and$T_{m}$ is higher for polygons with more edges at higher pressures but exhibitsa crossover for hexagon and octagon at low pressures. A theoretical frameworkconsidering the competition between entropy and enthalpy is proposed to providea comprehensive understanding of our results, which is anticipated tofacilitate the design of 2D materials.

Thermal Stabilities of Two-Dimensional Ball-Stick Polygons: A Critical Edge Number