Structures and electronic states of atomic-organic molecule wires on compound semiconductor surfaces.

利用高分辨电子能量损失谱（HREELS）、扫描隧道谱（STM）和同步辐射光电子能谱（SRPES）研究了氢吸附在GaP（001）表面P-P二聚体的一个P原子上，得到了（2x 1）重构。据报道，如果吡嗪桥连在电极之间，它可能显示出金属性质。为了检查这一点，将吡嗪吸附在InP（001）-（2x 4）表面上。发现吡嗪在In-In二聚体之间发生了吸附。然而，吡嗪的吸附量是非常小的。由于我们需要更多的吡嗪在表面上来研究电子态，我们正在尝试增加数量。对于Si（001）-（2x 1），吡嗪吸附在Si-Si二聚体之间，在未成键的Si原子上留下一个未成对电子。然后形成一维硅原子-吡嗪线。由于吡嗪的N原子与硅键合，因此吡嗪环上的派电子不会发生共振。这意味着吡嗪不是金属的。

We found that hydrogen is adsorbed on one P atom of a P-P dimer on a GaP(001) surface using high-resolution electron energy loss spectroscopy (HREELS), scanning tunneling spectroscopy (STM), synchrotron radiation photoemission spectroscopy (SRPES), leading to the (2x1) reconstruction. It was reported that pyrazine might show metallic property if it bridges between electrodes. In order to check this the pyrazine was adsorbed on an InP(001)-(2x4) surface. It was found that pyrazine was adsorbed between In-In dimer. However, the amount of pyrazine adsorbed was very small. Since we need more pyrazine on the surface to study the electronic states, we are trying to increase the amount. For Si(001)-(2x1) pyrazine is adsorbed between Si-Si dimer, leaving a unpaired electrons on Si atoms of unbonded Si atoms. Then one dimensional Si atom-pyrazine wires were formed. Since the N atoms of pyrazine were bonded to silicon, resonance of pai electrons on the pyrazine ring cannot occur. This implies that the pyrazine is not metallic.