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 Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

We report on tunneling measurements that reveal for the first time theevolution of the quasi-particle state density across the bandwidth controlledMott metal to insulator transition in the rare earth perovskite nickelates. Inthis, a canonical class of transition metal oxides, we study in particular twomaterials close to the T=0 metal-insulator transition: NdNiO3 , anantiferromagnetic insulator, and LaNiO3, a correlated metal. We measure a sharpgap in NdNiO3, which has an insulating ground state, of ~ 30 meV. Remarkably,metallic LaNiO3 exhibits a pseudogap of the same order that presages the metalinsulator transition. The smallness of both the gap and pseudogap suggests theyarise from a common origin: proximity to a quantum critical point at or nearthe T=0 metal-insulator transition. It also supports theoretical models of thequantum phase transition in terms of spin and charge instabilities of anitinerant Fermi surface.

Gaps and pseudo-gaps at the Mott quantum Critical point in the perovskite rare earth nickelates