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Sensing chiral magnetic noise via quantum impurity relaxometry
Physical Review B ( IF 3.7 ) Pub Date : 2020-12-04 , DOI: 10.1103/physrevb.102.220403
Avinash Rustagi , Iacopo Bertelli , Toeno van der Sar , Pramey Upadhyaya

We present a theory for quantum impurity relaxometry of magnons in thin films, exhibiting quantitative agreement with recent experiments without needing arbitrary scale factors used in theoretical models thus far. Our theory reveals that chiral coupling between prototypical spin>1/2 quantum impurities and magnons plays a central role in determining impurity relaxation, which is further corroborated by our experiments on nickel films interfaced with nitrogen-vacancy centers. Along with advancing magnonics and understanding decoherence in hybrid quantum platforms with magnets, the ability of a quantum impurity spin to sense chiral magnetic noise presents an opportunity to probe chiral phenomena in condensed matter.

中文翻译:

通过量子杂质弛豫法检测手性磁噪声

我们提出了一种用于薄膜中磁振子的量子杂质弛豫的理论,与最近的实验显示出定量的一致性,而无需到目前为止在理论模型中使用任意比例因子。我们的理论揭示了原型之间的手性耦合旋转>1个/2量子杂质和磁振子在确定杂质弛豫中起着核心作用,我们在与氮空位中心相交的镍膜上进行的实验进一步证实了这一点。伴随着先进的磁学和理解带磁体的混合量子平台中的退相干,量子杂质自旋感测手性磁噪声的能力为探索凝聚态中的手性现象提供了机会。
更新日期:2020-12-04
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