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/

Zendy Plus

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

Zendy Tools

Zendy Open

We study the spatial distribution of minority carriers arising from theiranomalous photon-assisted diffusion upon photo-excitation at an edge of n-InPslab for temperatures ranging from 300 K to 78 K. The experiment provides arealization of the "L\'evy flight" random walk of holes, in which the L\'evydistribution index gamma is controlled by the temperature. We show that thevariation \gamma(T) is close to that predicted earlier on the basis of theassumed quasi-equilibrium (van Roosbroek-Shockley) intrinsic emission spectrum,\gamma=1-\Delta /kT, where \Delta(T) is the Urbach tailing parameter of theabsorption spectra. The decreasing \gamma at lower temperatures results in agiant enhancement in the spread of holes -- over distances exceeding 1 cm fromthe region of photo-excitation.

Temperature controlled L\'evy flights of minority carriers in photoexcited bulk n-InP