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

We compute the renormalization group flow of the long-rangedelectron-electron interaction at the Gross-Neveu quantum critical point betweenthe semimetal and the excitonic insulator in graphene, perturbatively in thesmall parameter $\epsilon=d-1$, with $d$ as the spatial dimension. The$O(\epsilon)$ correction to the usual beta-function makes the long-rangeinteraction only more irrelevant at the critical than at the Gaussian fixedpoint. A weak long-range tail of the Coulomb interaction is found to bemarginally irrelevant also in arbitrary dimension when the number of Diracfermions is large. Its ultimate irrelevancy notwithstanding, it is shown thatthe metal-insulator transition may still be induced by increasing only thelong-range tail of the Coulomb interaction.

Coulomb interaction at the metal-insulator critical point in graphene