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

Artificial complex-oxide heterostructures containing ultrathin buried layersgrown along the pseudocubic [111] direction have been predicted to host aplethora of exotic quantum states arising from the graphene-like latticegeometry and the interplay between strong electronic correlations and bandtopology. To date, however, electronic-structural investigations of such atomiclayers remain an immense challenge due to the shortcomings of conventionalsurface-sensitive probes, with typical information depths of a few Angstroms.Here, we use a combination of bulk-sensitive soft x-ray angle-resolvedphotoelectron spectroscopy (SX-ARPES), hard x-ray photoelectron spectroscopy(HAXPES) and state-of-the-art first-principles calculations to demonstrate adirect and robust method for extracting momentum-resolved and angle-integratedvalence-band electronic structure of an ultrathin buckled graphene-like layerof $NdNiO_3$ confined between two 4-unit cell-thick layers of insulating$LaAlO_3$. The momentum-resolved dispersion of the buried Ni d states near theFermi level obtained via SX-ARPES is in excellent agreement with thefirst-principles calculations and establishes the realization of anantiferro-orbital order in this artificial lattice. The HAXPES measurementsreveal the presence of a valence-band (VB) bandgap of 265 meV. Our findingsopen a promising avenue for designing and investigating quantum states ofmatter with exotic order and topology in a few buried layers.

Electronic structure of a graphene-like artificial crystal of $NdNiO_3$