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

Quantum spin Hall insulator is characterized by the helical edge states, withthe spin polarization of electron being locked to its direction of motion.Although the edge-state conduction has been observed, unambiguous evidence ofthe helical spin texture is still lacking. Here, we investigate the coherentedge-state transport in an interference loop pinched by two point contacts. Dueto the helical character, the forward inter-edge scattering enforces a $\pi$spin rotation. Two successive processes can only produce a nontrivial $2\pi$ ortrivial $0$ spin rotation, which can be controlled by the Rashba spin-orbitcoupling. The nontrivial spin rotation results in a geometric $\pi$ Berryphase, which can be detected by a $\pi$ phase shift of the conductanceoscillation relative to the trivial case. Our results provide a smoking gunevidence for the helical spin texture of the edge states. Moreover, it alsoprovides the opportunity to all-electrically explore the trajectory-dependentspin Berry phase in condensed matter.

$\pi$ Spin Berry Phase in a Quantum-Spin-Hall-Insulator-Based Interferometer: Evidence for the Helical Spin Texture of the Edge States