Abstract (eng)
Atomic level observations of materials, are often carried out using a transmission electron microscope. Depending on the acceleration voltage of the electrons, the beam may induce defects in the sample. This happens when the momentum of the incoming electrons is high enough to knock out carbon atoms from the lattice. Atomistic simulations are a good way to test and predict such events.
Here, we study how the temperature affects the displacement threshold and how to include this effect when calculating the displacement cross section by using a Density Functional based Tight Binding method.