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

Using self consistent mean field and functional renormalization groupapproaches we show that s-wave pairing symmetry is robust in the heavilyelectron-doped iron chalcogenides $(\text{K, Cs}) \text{Fe}_{2-x}\text{Se}_2 $.This is because in these materials the leading antiferromagnetic (AFM) exchangecoupling is between next-nearest-neighbor (NNN) sites while the nearestneighbor (NN) magnetic exchange coupling is ferromagnetic (FM). This isdifferent from the iron pnictides, where the NN magnetic exchange coupling isAFM and leads to strong competition between s-wave and d-wave pairing in theelectron overdoped region. Our finding of a robust s-wave pairing in $(\text{K,Cs}) \text{Fe}_{2-x}\text{Se}_2$ differs from the d-wave pairing resultobtained by other theories where non-local bare interaction terms and the NNN$J_2$ term are underestimated. Detecting the pairing symmetry in $(\text{K,Cs}) \text{Fe}_{2-x}\text{Se}_2 $ may hence provide important insightsregarding the mechanism of superconducting pairing in iron basedsuperconductors.

Robustness of s-wave Pairing in Electron-Overdoped $\text{A}_{1-y}\text{Fe}_{2-x}\text{Se}_2$