Experimental observation of two-dimensional charge polarization in unisized platinum cluster disk bonded to silicon(1 1 1) surface
作者： Hisato Yasumatsu , Tetsuichiro Hayakawa , Tamotsu Kondow
DOI: 10.1016/J.CPLETT.2010.01.045
关键词: Atomic physics 、 Quantum tunnelling 、 Platinum 、 Delocalized electron 、 Electron 、 Atomic orbital 、 Silicon 、 Polarization (waves) 、 Spectroscopy 、 Chemistry
摘要: Abstract A local density of electronic states and a HOMO–LUMO gap monatomic-layered platinum cluster with size 30 (Pt disk) on silicon(1 1 1) surface were measured by space-resolved tunneling spectroscopy. It has been found that (1) both occupied unoccupied orbitals are delocalized due to Pt–Pt metallic interaction in the disk (2) electrons transferred adjacent silicon atoms so as induce two-dimensional charge polarization disk. The center is charged positively, while boundary between negatively.
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