Conservation of chirality at a junction between two Weyl semimetals,Physical Review B

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Conservation of chirality at a junction between two Weyl semimetals
Physical Review B ( IF 3.2 ) Pub Date : 2021-09-23 , DOI: 10.1103/physrevb.104.125308
S. Tchoumakov ₁ , B. Bujnowski _{2,

3} , J. Noky ₄ , J. Gooth ₄ , A. G. Grushin ₁ , J. Cayssol ₃

Affiliation

In Weyl semimetals the location of linear band crossings, the Weyl cones, is not bound to any high-symmetry point of the Brillouin zone, unlike the Dirac nodes in graphene. This flexibility is advantageous for valleytronics, where information is encoded in the valleys of the band structure when intervalley scattering is weak. However, if numerous Weyl cones coexist the encoded information can decohere rapidly because of band mixing. Here, we investigate how the helical isospin texture of Weyl cones affects valleytronics in heterojunctions of Weyl materials, and show how the chirality of this isospin texture can serve to encode information.

中文翻译：

两种外尔半金属交界处的手性守恒

在外尔半金属中，与石墨烯中的狄拉克节点不同，线状带交叉的位置，即外尔锥，不受布里渊区的任何高对称点的约束。这种灵活性对于谷电子学是有利的，当间隔散射较弱时，信息被编码在能带结构的谷中。然而，如果多个外尔锥体共存，则编码信息会由于带混合而迅速退相干。在这里，我们研究了外尔锥体的螺旋同位旋纹理如何影响外尔材料异质结中的谷电子学，并展示了这种同位旋纹理的手性如何用于编码信息。

更新日期：2021-09-23

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