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

A newly discovered family of the Fe-based superconductors is isostructuralwith the so-called 122 family of Fe pnictides, but has a qualitativelydifferent doping state. Early experiments indicate that superconductivity isnodeless, yet prerequisites for the $s_\pm$ nodeless state (generally believedto be realized in Fe superconductors) are missing. It is tempting to assign a$d-$ wave symmetry to the new materials, and it does seem at first glance thatsuch a state may be nodeless. Yet a more careful analysis shows that it is notpossible, given the particular 122 crystallography, and that the possiblechoice of admissible symmetries is severly limited: it is either a conventionalsingle-sign $s_{+}$ state, or another $s_\pm$ state, different from the onebelieved to be present in other Fe-based superconductors.

Symmetry analysis of possible superconducting states in KxFe2Se2 superconductors