Tip apex charging effects in tunneling spectroscopy
Mesoscale and Nanoscale Physics
2015-05-14 v1
Abstract
The influence of charged STM tip on the electron transport through quantum states on a surface is studied both theoretically and experimentally. The current and the differential conductance calculations are carried out by means of the Green's function technique and a tight-binding Hamiltonian. It is shown that sharp STM tip is extra occupied and this additional charge breaks the conductance symmetry for positive and negative STM voltages. The experiment on Ag islands with two STM tips (blunt and sharp) confirms our theoretical calculations.
Keywords
Cite
@article{arxiv.0911.4278,
title = {Tip apex charging effects in tunneling spectroscopy},
author = {T. Kwapinski and M. Jalochowski},
journal= {arXiv preprint arXiv:0911.4278},
year = {2015}
}
Comments
26 pages, 12 figures