Probing and imaging spin interactions with a magnetic single-molecule sensor
Probing and imaging spin interactions with a magnetic single-molecule sensor
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DOI：
10.1126/science.aaw7505
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发表时间：
2019-05-17
期刊：
影响因子：
56.9
通讯作者：
Ho, W.
中科院分区：
文献类型：
--
作者：
Czap, Gregory;Wagner, Peter J.;Ho, W.
磁性单原子和分子由于其作为最小可能的存储器、自旋电子学和量子位元的潜力而受到越来越多的研究关注。用于研究这些系统的扫描探针显微镜大大受益于新技术，使用分子功能化的提示，以提高空间和光谱分辨率，使新的传感能力。我们展示了一种显微镜技术，该技术使用吸附在扫描探针尖端尖端的磁性分子Ni（Ni）（2），以在所有三个空间方向上连续可调的方式感测与吸附在Ag（110）表面上的另一个分子的交换相互作用。我们进一步使用探针来成像交换相互作用强度的轮廓，揭示了两个磁性分子的量子态强烈混合的埃尺度区域。我们的研究结果为基于磁性单分子传感器的新纳米级成像能力铺平了道路。
Magnetic single atoms and molecules are receiving intensifying research focus because of their potential as the smallest possible memory, spintronic, and qubit elements. Scanning probe microscopes used to study these systems have benefited greatly from new techniques that use molecule-functionalized tips to enhance spatial and spectroscopic resolutions and enable new sensing capabilities. We demonstrate a microscopy technique that uses a magnetic molecule, Ni(cyclopentadienyl)(2), adsorbed at the apex of a scanning probe tip, to sense exchange interactions with another molecule adsorbed on a Ag(110) surface in a continuously tunable fashion in all three spatial directions. We further used the probe to image contours of exchange interaction strength, revealing angstrom-scale regions where the quantum states of two magnetic molecules strongly mix. Our results pave the way for new nanoscale imaging capabilities based on magnetic single-molecule sensors.