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 explore the scattering of Dirac electrons in a double-gated topologicalinsulator in the presence of magnetic proximity effects and warped surfacestates. It is found that a magnetic field can shift the Dirac cone in momentumspace and deform the constant-energy contour, or opens up a band gap at theDirac point, depending on the magnetization orientation. The double gatevoltage induces quantum wells and/or quantum barriers on the surface oftopological insulators, generating surface resonant tunnelling states. It isfound that the hexagonal warping effect can increase the electronic transportat high energies when the constant-energy contour exhibits a snowflake shape.The energy-dependent conductances in the parallel and antiparallel magneticconfigurations exhibit out-of-phase oscillations due to the quantuminterference of propagating waves in the region between the two magnetizedsegments. Although the conductance spectrum of the double-well structure ishigher than that of the double-barrier structure, the magnetoresistance ratioversus the separation distance between the two magnetized barriers exhibitspronounced oscillations due to the resonant tunnelling states. We show that thesurface state transport can be controlled by the exchange field and gatevoltage without breaking time reversal symmetry, suggesting that the doublegated and magnetized topological insulators can be utilized to achieve a largemagnetoresistance ratio with a tunable sign.

Surface state transport in double-gated and magnetized topological insulators with hexagonal warping effects