钾插层改性酞菁锰电子结构的综合实验研究
Electronic Structure of Manganese Phthalocyanine Modified via Potassium Intercalation: a Comprehensive Experimental Study
摘要：
钾（K）插层酞菁锰（MnPc）后，其费米能级附近的电子态发生了巨大的变化。然而，理论研究是有争议的电子构型。在这里，锰酞菁掺杂K的紫外，X射线，逆光电子能谱，以及近边X射线吸收精细结构光谱进行了研究。当K嵌入时，费米能级向最低未占据分子轨道移动，用捐赠的电子填充它，在占据态的能量区域中出现额外的特征。电子带被钉扎在费米能级以上0.5 eV和以下0.4 eV。Mn L3和L2边的分支比表明自旋态的增加。此外，Mn L和N K边缘的演变揭示了MnPc的Mn 3d和N 2 p状态之间的强杂交，并揭示了在地面和n-掺杂配置的电子占据。
英文摘要：
Potassium (K) intercalated manganese phthalocyanine (MnPc) reveals vast changes of its electronic states close to the Fermi level. However, theoretical studies are controversial regarding the electronic configuration. Here, MnPc doped with K was studied by ultraviolet, X-ray, and inverse photoemission, as well as near edge X-ray absorption fine structure spectroscopy. Upon K intercalation the Fermi level shifts toward the lowest unoccupied molecular orbital filling it up with donated electrons with the appearance of an additional feature in the energy region of the occupied states. The electronic bands are pinned 0.5 eV above and 0.4 eV below the Fermi level. The branching ratio of the Mn L3 and L2 edges indicate an increase of the spin state. Moreover, the evolution of the Mn L and N K edges reveals strong hybridization between Mn 3d and N 2p states of MnPc and sheds light on the electron occupation in the ground and n-doped configurations.
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