Our Calculations - Copper, Vanadium
The influence of point defects on the melting temperature of copper
with Amit Kanigel and Slava Sorkin
from our group and Emil Polturak and students on the experimental side.
The experimental system here initially
was helium (where a dramatic decrease
in the shear resistance occured just prior to the bcc-hcp transition.)
We then began to study the relation between defects and
melting phenomena, and Amit found that copper
a ``tight-binding'' potential
the interesting result that
interstitials reduce the elastic coefficients while vacancies do
not. One paper will
shortly, a second is in preparation.
These phenomena do not appear with Lenard Jones potentials, but correlate
with experimental results for many other fcc metals.
Slava is using vanadium to test whether the results
also appear with bcc metals.