Electron transport across a quantum wire in the presence of electron leakage to a substrate |
| |
Authors: | T?Kwapiński S?Kohler P?H?nggi |
| |
Institution: | (1) Department of Physics, University of Guelph, Guelph, Ontario, N1G 2W1, Canada |
| |
Abstract: | We investigate electron transport through a mono-atomic wire
which is tunnel coupled to two electrodes and also to the underlying
substrate. The setup is modeled by a tight-binding Hamiltonian and
can be realized with a scanning tunnel microscope (STM). The
transmission of the wire is obtained from the corresponding Green’s
function. If the wire is scanned by the contacting STM tip, the
conductance as a function of the tip position exhibits oscillations
which may change significantly upon increasing the number of wire atoms. Our
numerical studies reveal that the conductance depends strongly on
whether or not the substrate electrons are localized. As a further
ubiquitous feature, we observe the formation of charge oscillations. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|