论文标题
电场驱动的自旋共振通过地下交换耦合到单原子磁铁
Electric-field-driven spin resonance by on-surface exchange coupling to a single-atom magnet
论文作者
论文摘要
最近，通过在扫描隧道显微镜（STM）中使用电子自旋共振（ESR）来证明对表面上单个原子和分子旋转的相干控制。在这里，我们提出了单个氢化Ti原子的ESR的合并实验和建模研究，该研究与位于0.6-0.8 nm距离的Fe Adatom交换。 Ti自旋的连续波和脉冲ESR显示出2个贡献的狂犬病率，一个来自尖端，另一个来自Fe，其自旋相互作用与Ti的自旋相互作用是通过射频电场调节的。 Fe的贡献与尖端相当，如尖端缩回时的优势，并且使用向量磁场可调节。我们的新ESR方案允许在不需要与尖端进行磁相互作用的情况下解决并相干控制地面单个旋转。这项研究确立了在表面上基于旋转的多量系统的可行实现。
Coherent control of individual atomic and molecular spins on surfaces has recently been demonstrated by using electron spin resonance (ESR) in a scanning tunneling microscope (STM). Here we present a combined experimental and modeling study of the ESR of a single hydrogenated Ti atom that is exchange-coupled to a Fe adatom located in 0.6-0.8 nm away. Continuous wave and pulsed ESR of the Ti spin showed a Rabi rate with two contributions, one from the tip and the other from the Fe, whose spin interactions with Ti were modulated by the radio-frequency electric field. The Fe contribution is comparable to the tip, as revealed from its dominance when the tip was retracted, and tunable using a vector magnetic field. Our new ESR scheme allows on-surface individual spins to be addressed and coherently controlled without the need for magnetic interaction with a tip. This study establishes a feasible implementation of spin-based multi-qubit systems on surfaces.
