Thermal spike - A. SORKIN with JA and RAFI KALISH
When an implanted ion slows down
a highly disrupted, very hot,
region forms inside the diamond crystal. This is
called a "thermal spike"
It can be viewed as the short term local
melting of the implantation affected region and is at least initially
- Samples were prepared which were periodic in x and y directions
with fixed diamond layers at top and bottom.
central part was heated to amorphize it,
Picture below at left is of 192 atoms,
after 5,000 steps.
Each step 0.5femtoseconds
green twofold coordinated
- Visualizations: see
mpg of the still below left,
with initial energy equivalent to 23,000K, or see
animated gif of the still below left.
If the middle layer was
not given sufficient energy it returned to diamond: see
of the return when initial energy equivalent to 20,000K.
These simulations were repeated for different lattice sizes and
also for samples which were initally amorphous, see
gif of the amorphous case,
(at right above). An animation of its preparation can be viewed, here .
- The manuscript describing these results just appeared in PRB.