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 Tools annual

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 monthly

Global: Zendy Plus monthly

Presents the access of premium content as premium feature

Premium Content

Global: Zendy Plus annual

Global: Zendy Free Plan

In Ca1-xRExFeAs2 (RE= rare earth), an antiferromagnetic (AFM) phase as wellas a structural transition has been reported, even in the electron-overdopedregime. Here we investigated the temperature-dependent in-plane opticalspectroscopy of overdoped Ca0.77Nd0.23FeAs2. Upon entering the AFM state, wefound an abrupt reduction of low-frequency (500-2 000 cm-1) spectral weight inthe optical conductivity. In sharp contrast to the parent compounds of 122system, where spin-density-wave gaps have been clearly observed in the AFMstate, a gap signature is absent in Ca0.77Nd0.23FeAs2. This may be aconsequence of the poor nesting condition between hole and electron pockets.However, a spectral weight analysis shows that the reduced spectral weight atlow frequency is transferred to the high frequency range (> 4 000 cm-1),pointing to a localization effect. These observations suggest that the AFMorder in Ca0.77Nd0.23FeAs2 is most likely to originate from a localized naturerather than Fermi surface nesting.

Optical study of the antiferromagnetic ordered state in electron-overdoped Ca0.77Nd0.23FeAs2