Abstract In the Fowler-Nordheim regime of Scanning Tunneling Microscopy (STM) the tip-target distance is few nanometers to few tens of nanometers. In this situation the tunneling between tip and target is completely suppressed. Instead, electrons can be field-emitted from the tip and their impact with the target might excite electrons off the surface. Under certain circumstances, the excited electrons escape the tip-target junction and build a new electronic system, absent in the tunneling regime of STM. A recent experiment discovered that this electronic system is spin polarized at nanoscale tip-target distances. Here we provide a comprehensive review of all strategies that have been adopted to perform the spin polarized experiments in the Fowler-Nordheim regime of STM. We also present new data that complement the proof of spin polarization and specifically underline the magnetic imaging potential of this new technology, which we call Scanning Field Emission Microscopy with Polarization Analysis (SFEMPA).

中文翻译：

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带偏振分析的扫描场发射显微镜 (SFEMPA)

摘要 在扫描隧道显微镜 (STM) 的 Fowler-Nordheim 机制中，尖端-目标距离为几纳米到几十纳米。在这种情况下，尖端和目标之间的隧道效应被完全抑制。相反，电子可以从尖端场发射，它们与目标的碰撞可能会激发表面的电子。在某些情况下，被激发的电子会逃离尖端 - 目标结并建立一个新的电子系统，这在 STM 的隧道机制中是不存在的。最近的一项实验发现，该电子系统在纳米级尖端-目标距离处自旋极化。在这里，我们全面回顾了在 STM 的 Fowler-Nordheim 体系中进行自旋极化实验所采用的所有策略。