Hybridized electronic states in potassium-doped picene probed by soft x-ray spectroscopies
Hybridized electronic states in potassium-doped picene probed by soft x-ray spectroscopies
复制标题
DOI：
10.1063/1.4760232
复制
发表时间：
2012-08
期刊：
影响因子：
1.6
通讯作者：
H. Yamane;N. Kosugi
中科院分区：
文献类型：
--
作者：
H. Yamane;N. Kosugi
本文用X射线吸收光谱和发射光谱的元素选择性和体敏光子探测方法研究了钾掺杂和未掺杂的picene晶体薄膜的空态和占据态的电子结构。我们观察到掺杂诱导的未占和占电子态的形成在K掺杂的picene。通过内壳层共振激发实验，我们观察到K与picene在费米能级附近的轨道杂化。此外，共振X射线发射实验表明，在K掺杂的picene的拉曼活性的电子振动相互作用的存在。这些实验证据在掺钾的picene的超导电性中起着至关重要的作用。
The electronic structure of the unoccupied and occupied states of potassium (K)-doped and undoped picene crystalline films has been investigated by using the element-selective and bulk-sensitive photon-detection methods of X-ray absorption and emission spectroscopies. We observed the formation of the doping-induced unoccupied and occupied electronic states in K-doped picene. By applying the inner-shell resonant-excitation experiments, we observed the evidence for the orbital hybridization between K and picene near the Fermi energy. Furthermore, the resonant X-ray emission experiment suggests the presence of the Raman-active vibronic interaction in K-doped picene. These experimental evidences play a crucial role in the superconductivity of K-doped picene.