单层有机晶体中单个掺杂中心的振动光谱学。

Vibrational spectroscopy of individual doping centers in a monolayer organic crystal.

作者信息

Nazin G V, Qiu X H, Ho W

机构信息

Department of Physics and Astronomy, University of California, Irvine, California 92697-4575, USA.

出版信息

J Chem Phys. 2005 May 8;122(18):181105. doi: 10.1063/1.1908719.

DOI:10.1063/1.1908719

PMID:15918686

Abstract

A scanning tunneling microscope (STM) is used to study individual Ag doping centers in a monolayer of C60 molecules supported on a thin Al2O3 film grown on the NiAl(110) surface. Vibronic states of the doping centers are observed with differential conductance (dIdV) spectroscopy. The double-barrier nature of the junction results in bipolar transport: same states participate in charge transport at both bias voltage polarities. Identification of the dIdV features corresponding to bipolar conduction enables a new mode of vibrational spectroscopy with STM.

摘要

扫描隧道显微镜（STM）用于研究在NiAl(110)表面生长的薄Al2O3膜上支撑的单层C60分子中的单个银掺杂中心。通过微分电导（dIdV）光谱观察掺杂中心的振动电子态。结的双势垒性质导致双极输运：相同的状态在两个偏置电压极性下都参与电荷输运。识别与双极传导对应的dIdV特征实现了一种利用STM的新型振动光谱模式。