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 model for magnetoresistance in positionally disordered organic materials ispresented and solved using percolation theory. The model describes the effectsof spin flips on hopping transport by considering the effect of spin dynamicson an effective density of hopping sites. Faster spin-flip transitions open up`spin-blocked' pathways to become viable conduction channels and hence producesmagnetoresistance. The magnetoresistance can be found analytically in severalregimes, including when the spin-flip time is slower than the hopping time. Theratio of hopping time to the hyperfine precession time is a crucial quantity indetermining the shape of magnetoresistance curves. Studies of magnetoresistancein known systems with controllable positional disorder would provide astringent test of this model.

Spin-flip induced magnetoresistance in positionally disordered organic solids