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

The electronic structure of LaOFeAs, a parent compound of iron-arsenicsuperconductors, is studied by angleresolved photoemission spectroscopy. Byexamining its dependence on photon energy, polarization, sodium dosing and thecounting of Fermi surface volume, both the bulk and the surface contributionsare identified. We find that a bulk band moves toward high binding energiesbelow structural transition, and shifts smoothly across the spin density wavetransition by about 25 meV. Our data suggest the band reconstruction may play acrucial role in the spin density wave transition, and the structural transitionis driven by the short range magnetic order. For the surface states, both theLaO-terminated and FeAs-terminated components are revealed. Certain small bandshifts are verified for the FeAs-terminated surface states in the spin densitywave state, which is a reflection of the bulk electronic structurereconstruction. Moreover, sharp quasiparticle peaks quickly rise at lowtemperatures, indicating of drastic reduction of the scattering rate. A kinkstructure in one of the surface band is shown to be possibly related to theelectron-phonon interactions.

Surface and bulk electronic structures of LaOFeAs studied by angle resolved photoemission spectroscopy