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 discovery of the anomalous Hall effect (AHE) in bulk metallicantiferromagnets (AFMs) motivates the search of the same phenomenon intwo-dimensional (2D) systems, where a quantized anomalous Hall conductance canin principle be observed. Here, we present experiments on micro-fabricateddevices based on Co$_{1/3}$NbS$_2$, a layered AFM that was recently found toexhibit AHE in bulk crystals below the N\'eel temperature T$_N$ = 29 K.Transport measurements reveal a pronounced resistivity anisotropy, indicatingthat upon lowering temperature the electronic coupling between individualatomic layers is increasingly suppressed. The experiments also show anextremely large anomalous Hall conductivity of approximately 400 S/cm, morethan one order of magnitude larger than in the bulk, which demonstrates theimportance of studying the AHE in small exfoliated crystals, less affected bycrystalline defects. Interestingly, the corresponding anomalous Hallconductance, when normalized to the number of contributing atomic planes, is$\sim \, 0.6 \; e^2/h$ per layer, approaching the value expected for thequantized anomalous Hall effect. The observed strong anisotropy of transportand the very large anomalous Hall conductance per layer make the properties ofCo$_{1/3}$NbS$_2$ compatible with the presence of partially filledtopologically non-trivial 2D bands originating from the magnetic superstructureof the antiferromagnetic state. Isolating atomically thin layers of thismaterial and controlling their charge density may therefore provide a viableroute to reveal the occurrence of the quantized AHE in a 2D AFM.

Giant anomalous Hall effect in quasi-two-dimensional layered antiferromagnet Co$_{1/3}$NbS$_2$