Magnetic properties of surface molecular Kondo lattice and control of the spin states.

通过低温强磁场扫描隧道显微镜（STM）研究发现，FePc在Au（111）表面的单层膜具有近藤晶格特征。在Au（111）上的FePc分子在dI/dV谱中显示近藤共振，即DOS。此外，FePc分子在表面形成正方形晶格结构。在本研究中，我研究了FePc在Au（111）上的近藤性质（近藤温度T_K=2。6 K），并通过控制覆盖率来形成晶格结构。从近藤云的空间分布来看，FePc近藤晶格中没有重费米子相，而是反铁磁有序相。这是由于FePc和Au衬底之间的RKKY相互作用比Kondo耦合更强。接下来，我研究FePc操纵。通过使用STM针尖，可以改变FePc分子的位置。通过CO和NO分子的额外配位，FePc的近藤特征发生了急剧变化。这些方法也适用于晶格系统（FePc单层）。

I found that FePc monolayer on Au(111) has a Kondo lattice feature by low temperature STM with strong magnetic field. An FePc molecule on Au(111) shows Kondo resonance in the dI/dV spectrum, that is, DOS. In addition, FePc molecules form square lattice structure on the surface. In this study, I investigated the Kondo property of FePc on Au(111)(Kondo temperature T_K=2. 6K), and the formation of the lattice structure by controlling the coverage. FePc Kondo lattice shows not the heavy Fermion phase but the antiferromagnetic order phase from the spatial distribution of the Kondo cloud. This is caused by the stronger intermolecular RKKY interaction than the Kondo coupling between an FePc and the Au substrate. Next, I investigate the FePc manipulation. By using STM tip, the position of an FePc molecule can be changed. And by additional coordination of a CO and an NO molecules, the Kondo feature of the FePc is drastically changed. These methods were also applied to the lattice system(FePc monolayer).