在SiC中用自旋量子比特映射纳米磁体的杂散场
Mapping the stray fields of a nanomagnet using spin qubits in SiC
摘要：
我们报告了使用光学可寻址的自旋量子比特在SiC探测的磁性杂散场所产生的铁磁微结构上的SiC晶体的表面上光刻图案。杂散场引起自旋中心的共振频率的偏移。自旋共振由邻近磁性元件图案化的微米尺寸的微波天线驱动。天线的图案化是为了确保驱动微波场被局部传递，并且与传统的毫米级电路相比更有效。对于两种不同的磁性状态，在到磁性元件的不同距离处观察到SiC中自旋中心的共振频率的明显差异。我们的研究结果提供了一个晶圆级的平台，开发混合磁振子量子应用部署本地微波场和杂散场景观在微米的长度尺度。
英文摘要：
We report the use of optically addressable spin qubits in SiC to probe the magnetic stray fields generated by a ferromagnetic microstructure lithographically patterned on the surface of a SiC crystal. The stray fields cause shifts in the resonance frequency of the spin centers. The spin resonance is driven by a micrometer-sized microwave antenna patterned adjacent to the magnetic element. The patterning of the antenna is done to ensure that the driving microwave fields are delivered locally and more efficiently compared to conventional, millimeter-sized circuits. A clear difference in the resonance frequency of the spin centers in SiC is observed at various distances to the magnetic element, for two different magnetic states. Our results offer a wafer-scale platform to develop hybrid magnon-quantum applications by deploying local microwave fields and the stray field landscape at the micrometer lengthscale.
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