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

In our previous work (E. Kogan, Phys. Rev. B 84, 115119 (2011)) we presentedcalculation of RKKY interaction between two magnetic impurities in graphenebased on Matsubara Green's functions (MGF) in the coordinate -- imaginary timerepresentation. Now we present the calculation based on MGF in the coordinate-- frequency representation. We claim that both approaches have an importantadvantage over those based on zero temperature Green's functions (ZTGF), whichare very briefly reviewed in the beginning of the present work. The MGFapproaches, in distinction to the ZTGF approaches, operate only with theconvergent integrals from the start to the end of the calculation. Thecoordinate -- frequency representation for the MGF turns out to be asconvenient as the coordinate -- imaginary time representation and allows toeasily consider the cases of doped and gapped graphene.

While calculating RKKY interaction in graphene no theorist should do a cut-off without cause