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 Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

Materials that break time-reversal or inversion symmetry possessnondegenerate electronic bands, which can touch at so-called Weyl points. Thespinor eigenstates in the vicinity of a Weyl point exhibit a well-definedchirality $\pm 1$. Numerous works have studied the consequences of thischirality, for example in unconventional magnetoelectric transport. However,even a Weyl point with isotropic dispersion is not only characterized by itschirality but also by the momentum dependence of the spinor eigenstates. For asingle Weyl point, this momentum-space spin structure can be brought intostandard "hedgehog" form by a unitary transformation, but for two or more Weylpoints, this is not possible. In this work, we show that the relative spinstructure of a pair of Weyl points has strong qualitative signatures in theelectromagnetic response. Specifically, we investigate the Friedel oscillationsin the induced charge density due to a test charge for a centrosymmetric systemconsisting of two Weyl points with isotropic dispersion. The most pronouncedsignature is that the amplitude of the Friedel oscillations falls off as$1/r^4$ in directions in which both Weyl points exhibit the same spinstructure, while for directions with inverted spin structures, the amplitude ofthe Friedel oscillations decreases as $1/r^3$.

Irreducible momentum-space spin structure of Weyl semimetals and its signatures in Friedel oscillations