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

A quantum graph model for a single sheet of graphene is extended to bilayerand trilayer Bernal-stacked graphene; the spectra are characterized and thedispersion relations explicitly obtained; Dirac cones are then proven to bepresent only for trilayer graphene, although the bilayer has a gaplessparabolic band component. Our model rigorously exhibits basic facts fromtight-binding calculations, effective two-dimensional models and a$\pi$-orbital continuum model with nearest-neighbour tunneling that have beendiscussed in the physics literature.

Dirac cones for bi- and trilayer Bernal-stacked graphene in a quantum graph model