Signatures of a Charge Density Wave Phase and the Chiral Anomaly in the Fermionic Material Cobalt Monosilicide CoSi,Advanced Electronic Materials

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Signatures of a Charge Density Wave Phase and the Chiral Anomaly in the Fermionic Material Cobalt Monosilicide CoSi
Advanced Electronic Materials ( IF 5.3 ) Pub Date : 2019-11-22 , DOI: 10.1002/aelm.201900857
Lauritz Schnatmann _{1,

2} , Kevin Geishendorf _{1,

2} , Michaela Lammel _{1,

2} , Christine Damm ₁ , Sergey Novikov ₃ , Andy Thomas ₁ , Alexander Burkov ₃ , Heiko Reith ₁ , Kornelius Nielsch _{1,

2,

4} , Gabi Schierning ₁

Affiliation

Materials with topological electronic states have emerged as one of the most exciting discoveries of condensed quantum matter, hosting quasiparticles with extremely low effective mass and high mobility. Weyl materials contain such topological states in the bulk and additionally have a non‐trivial chiral charge. However, despite known quantum effects caused by these chiral states, the interplay between chiral states, and a charge density wave phase, an ordering of the electrons to a correlated phase is not experimentally explored. Indications for the formation of a charge density wave phase in the Weyl material cobalt monosilicide CoSi are observed. Furthermore, the typical signatures of the charge density wave phase together with typical signatures of Weyl fermions in magnetic field dependent electrical transport characterization are investigated. The charge density wave and the chiral contribution to the electrical magneto‐transport are separated as well as a suppression of the charge density wave phase is observed in magnetic fields.

中文翻译：

费米材料钴单硅化钴CoSi的电荷密度波相位和手征异常的特征

具有拓扑电子状态的材料已经成为凝聚量子物质最令人兴奋的发现之一，它以非常低的有效质量和高迁移率承载着准粒子。Weyl材料在整体中具有此类拓扑状态，此外还具有非平凡的手性电荷。然而，尽管已知由这些手性态，手性态之间的相互作用以及电荷密度波相引起的量子效应，但仍未通过实验探索电子向相关相的排序。观察到在Weyl材料单硅化钴钴Si中形成电荷密度波相的迹象。此外，还研究了电荷密度波相位的典型特征以及韦尔费米子在磁场相关的电输运特性中的典型特征。

更新日期：2020-02-13

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