break junction techniques,
is possible to reduce metal
few atom thickness
fabricate atomic-scale contacts.
As has been demonstrated recently, these
as reliable two-terminal switches
the applied bias voltage and
was found that the
process is caused by the reversible rearrangement of single atoms,
the interplay between the atomic structural rearrangement and
the current due
to the applied bias voltage
is not fully understand yet.
The aim of this
project is to perform molecular dynamics simulations of atomic size
metal junctions, including current-induced forces. We want to predict
the effect of high current densities on the atomic structure and thus
the stability of different nanojunctions, and, in particular,
understand the switching behavior observed in the experiments.
Student should know solid state physics (eg course 10303). Student should be at least superficially experienced with Python. We recommend (but dont require) eg. course 10325.