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

The recently discovered Fe-based superconductor (FeBS) LaFe2As2 seems tobreak away from an established pattern that doping FeBS beyond 0.2e/Fe destroyssuperconductivity. LaFe2As2 has an apparent doping of 0.5e, yet superconductsat 12.1 K. Its Fermi surface bears no visual resemblance with the canonicalFeBS Fermiology. It also exhibits two phases, none magnetic and only onesuperconducting. We show that the difference between them has nonethelessmagnetic origin, the one featuring disordered moments, and the other locallynonmagnetic. We find that La there assumes an unusual valence of +2.6 to +2.7,so that the effective doping is reduced to 0.30-0.35e. A closer look revealsthe same key elements: hole Fermi surfaces near Gamma-Z and electron ones nearthe X-P lines, with the corresponding peak in susceptibility, and a strongtendency to stripe magnetism. The physics of LaFe2As2 is thus more similar tothe FeBS paradigm than hitherto appreciated.

Novel Fe-based superconductor LaFe2As2 in comparison with traditional pnictides