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

The topological insulating phase results from inversion of the band gap dueto spin-orbit coupling at an odd number of time-reversal symmetric points. InBi$_2$Se$_3$, this inversion occurs at the $\Gamma$ point. For bulkBi$_2$Se$_3$, we have analyzed the effect of arbitrary strain on the $\Gamma$point band gap using Density Functional Theory. By computing the band structureboth with and without spin-orbit interactions, we consider the effects ofstrain on the gap via Coulombic interaction and spin-orbit interactionseparately. While compressive strain acts to decrease the Coulombic gap, italso increases the strength of the spin-orbit interaction, increasing theinverted gap. Comparison with Bi$_2$Te$_3$ supports the conclusion that effectson both Coulombic and spin-orbit interactions are critical to understanding thebehavior of topological insulators under strain, and we propose that thetopological insulating phase can be effectively manipulated by inducing strainthrough chemical substitution.

Theoretical investigation of the evolution of the topological phase of Bi$_{2}$Se$_{3}$ under mechanical strain