Scanning tunneling microscopy and spectroscopy on bottom-up fabricated low-dimensional quantum magnets on surfaces

过去，磁铁被理解为经典自旋（矢量）的集合。然而，近几十年来，不能用经典物理图像解释的低维（low-d）量子磁体引起了人们的广泛关注，各种模型化合物已被化学合成。我们的目标是利用扫描隧道显微镜（STM）通过单原子/分子操作实现自下而上在表面上制造理想的低d量子磁体，并利用自旋极化的STM对其磁性进行详细和局部的研究。为了实现这一目标，我们成功地建立了两个重要的关键技术：单原子/分子操纵和自旋极化STM。

In the past, a magnet has been understood as an assembly of classical spins (vectors). In recent decades, however, low-dimensional (low-d) quantum magnets, which cannot be explained with the classical physical picture, have attracted much attention, and various model compounds have been chemically synthesized. We aimed to achieve bottom-up fabrication of ideal low-d quantum magnets on surfaces by single atom/molecule manipulation with the scanning tunneling microscope (STM) and investigate the magnetic properties in detail and locally with spin-polarized STM. To pursue this goal, we succeeded to establish two important key techniques: single atom/molecule manipulation and spin-polarized STM.