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

When two separately contacted quantum Hall (QH) edge channels are broughtinto interaction, they can equilibrate their imbalance via scatteringprocesses. In the present work we use a tunable QH circuit to implement ajunction between co-propagating edge channels whose length can be controlledwith continuity. Such a variable device allows us to investigate howcurrent-voltage characteristics evolve when the junction length d is changed.Recent experiments with fixed geometry reported a significant reduction of thethreshold voltage for the onset of photon emission, whose origin is still underdebate. Our spatially resolved measurements reveal that this threshold shiftdepends on the junction length. We discuss this unexpected result on the basisof a model which demonstrates that a heating of electrons is the dominantprocess responsible for the observed reduction of the threshold voltage.

Impact of electron heating on the equilibration between quantum Hall edge channels