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

We report the experimental results from a dark study and a photo-excitedstudy of the high mobility GaAs/AlGaAs system at large filling factors, $\nu$.At large-$\nu$, the dark study indicates several distinct phase relations("Type-1", "Type-2", and "Type-3") between the oscillatory diagonal- and Hall-resistances, as the canonical Integral Quantum Hall Effect (IQHE) is manifestedin the "Type-1" case of approximately orthogonal diagonal- and Hall resistance-oscillations. Surprisingly, the investigation indicates quantum Hall plateausalso in the "Type-3" case characterized by approximately "anti-phase" Hall- anddiagonal- resistance oscillations, suggesting a new class of IQHE.  Transport studies under microwave photo-excitation exhibit radiation-inducedmagneto-resistance oscillations in both the diagonal, $R_{xx}$, andoff-diagonal, $R_{xy}$, resistances. Further, when the radiation-inducedmagneto-resistance oscillations extend into the quantum Hall regime, thereoccurs a radiation-induced non-monotonic variation in the amplitude ofShubnikov-de Haas (SdH) oscillations in $R_{xx}$ \textit{vs}. B, and anon-monotonic variation in the width of the quantum Hall plateaus in $R_{xy}$.The latter effect leads into the vanishing of IQHE at the minima of theradiation-induced $R_{xx}$ oscillations with increased photo-excitation. Wereason that the mechanism which is responsible for producing the non-monotonicvariation in the amplitude of SdH oscillations in $R_{xx}$ underphoto-excitation is also responsible for eliminating, under photo-excitation,the novel "Type-3" IQHE in the high mobility specimen.

physical review. b, condensed matter and materials physics

Phase study of oscillatory resistances in microwave-irradiated- and  dark- GaAs/AlGaAs devices: Indications of a new class of integral quantum  Hall effect