论文标题
通过色散读数的有机微晶的脉冲电子自旋共振
Pulsed Electron Spin Resonance of an Organic Microcrystal by Dispersive Readout
论文作者
论文摘要
我们建立了一个测试床系统，用于开发在低温温度下针对小样品的高敏性电子自旋共振（ESR）技术。我们的系统由硝酸氮化液薄膜平面超导微导剂组成，设计为浓缩模式的体积，可将夫妇置于少量的顺磁性材料，并可以弹性到高达400吨的磁场。在65 MK时，我们将高共振耦合（$ c \ 19 $）测量到有机自由基微晶，该微晶体包含$ 10^{12} $ spins in Pico-litre卷。我们通过谐振器的分散频移检测自旋晶格的分解速率。诸如此类的技术可能适用于量子信息中的应用以及极少数旋转的脉冲ESR询问，并且可以为例如超导量子处理器中的材料缺陷提供对表面化学的见解。
We establish a testbed system for the development of high-sensitivity Electron Spin Resonance (ESR) techniques for small samples at cryogenic temperatures. Our system consists of a Niobium Nitride thin-film planar superconducting microresonator designed to have a concentrated mode volume to couple to a small amount of paramagnetic material, and to be resilient to magnetic fields of up to 400 mT. At 65 mK we measure high-cooperativity coupling ($C \approx 19$) to an organic radical microcrystal containing $10^{12}$ spins in a pico-litre volume. We detect the spin-lattice decoherence rate via the dispersive frequency shift of the resonator. Techniques such as these could be suitable for applications in quantum information as well as for pulsed ESR interrogation of very few spins and could provide insights into the surface chemistry of, for example, the material defects in superconducting quantum processors.
