Engineering negative differential conductance with the Cu(111) surface state |
| |
Authors: | Heinrich B W Rastei M V Choi D-J Frederiksen T Limot L |
| |
Affiliation: | Institut de Physique et Chimie des Matériaux de Strasbourg, CNRS Université de Strasbourg, F-67034 Strasbourg, France. |
| |
Abstract: | Low-temperature scanning tunneling microscopy and spectroscopy are employed to investigate electron tunneling from a C60-terminated tip into a Cu(111) surface. Tunneling between a C60 orbital and the Shockley surface states of copper is shown to produce negative differential conductance (NDC) contrary to conventional expectations. NDC can be tuned through barrier thickness or C60 orientation up to complete extinction. The orientation dependence of NDC is a result of a symmetry matching between the molecular tip and the surface states. |
| |
Keywords: | |
本文献已被 PubMed 等数据库收录! |