论文标题
通过干扰隧穿电流的单节奏二聚体的电子自旋光谱法
Electron spin spectroscopy of single TEMPO dimers coupled via interfering tunneling currents
论文作者
论文摘要
我们报告了稳定自由基2,2,6,6-四甲基二哌啶-1-氧基（TEMPO）的单个二聚体中电子自旋共振（ESR）的检测。 ESR通过扫描隧道显微镜（ESR-STM方法）中的当前波动来测量。与宏观数据不同的多峰功率谱分配给具有旋转轨道耦合的二聚体和具有交换和dzyaloshinskii-moriya相互作用。这些相互作用是在我们的模型中通过二聚体的两个分子从尖端到样品的电子隧穿通路产生的。这是首次证明通过两个自旋进行隧穿是ESR-STM方法的有效机制。
We report the detection of electron spin resonance (ESR) in individual dimers of the stable free radical 2,2,6,6-tetramethyl-piperidine-1-oxyl (TEMPO). ESR is measured by the current fluctuations in a scanning tunnelling microscope (ESR-STM method). The multi-peak power spectra, distinct from macroscopic data, are assigned to dimers having exchange and Dzyaloshinskii-Moriya interactions in presence of spin-orbit coupling. These interactions are generated in our model by interfering electronic tunneling pathways from tip to sample via the dimer's two molecules. This is the first demonstration that tunneling via two spins is a valid mechanism of the ESR-STM method.
