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

A Kondo lattice is often electrically insulating at low temperatures.However, several recent experiments have detected signatures of bulkmetallicity within this Kondo insulating phase. Here we visualize thereal-space charge landscape within a Kondo lattice with atomic resolution usinga scanning tunneling microscope. We discover nanometer-scale puddles ofmetallic conduction electrons centered around uranium-site substitutions in theheavy-fermion compound URu$_2$Si$_2$, and around samarium-site defects in thetopological Kondo insulator SmB$_6$. These defects disturb the Kondo screeningcloud, leaving behind a fingerprint of the metallic parent state. Our resultssuggest that the mysterious 3D quantum oscillations measured in SmB$_6$ couldarise from these Kondo-lattice defects, although we cannot rule out otherexplanations. Our imaging technique could enable the development ofatomic-scale charge sensors using heavy-fermion probes.

Visualizing the atomic-scale origin of metallic behavior in Kondo insulators