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

A microscopic magnetic model for alpha-Cu2P2O7 is evaluated in a combinedtheoretical and experimental study. Despite a dominant intradimer coupling J1,sizable interdimer couplings enforce long-range magnetic ordering at T_N=27 K.The spin model for alpha-Cu2P2O7 is compared to the models of the isostructuralbeta-Cu2V2O7 and alpha-Cu2As2O7 systems. As a surprise, coupled dimers inalpha-Cu2P2O7 and alternating chains in alpha-Cu2As2O7 contrast with ahoneycomb lattice in beta-Cu2V2O7. We find that the qualitative difference inthe coupling regime of these isostructural compounds is governed by the natureof AO4 side groups: d-elements (A = V) hybridize with nearby O atoms forming aCu-O-A-O-Cu superexchange path, while for p-elements (A = P, As) thesuperexchange is realized via O-O edges of the tetrahedron. Implications for abroad range of systems are discussed.

Peculiar long-range superexchange in Cu2A2O7 (A = P, As, V) as a key element of the microscopic magnetic model