Abstract
The material of this chapter closely follows the contents of a review article [1] written by the present author and submitted for publication in the Institute of Physics journal Reports on Progress in Physics.
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Notes
- 1.
- 2.
Such quantities have the dimensions of a force, and, indeed, the term ‘stopping force’ is gaining currency. But historically ‘stopping power’ has been prevalent and we shall use it here.
- 3.
- 4.
SRIM stands for ‘the stopping and range of ions in matter’.
- 5.
At higher velocities v > v 0, this simple picture of a retarded screening response becomes much more complicated. For instance, strong oscillations appear in the induced charge density. A full discussion of these so-called wake effects is included in the review by Echenique et al. [7].
- 6.
Note that some more recent work with time-dependent DFT (Campillo et al. [57] and Pitarke and Campillo [58]) and a linear combination of atomic orbitals approach (Dorado and Flores [59]) is capable of predicting the stopping force on a channelling ion as a function of the distance of the ion from the central axis of the path. Such models fall short of incorporating a full dependence on the surrounding atomic environment, though.
- 7.
The Wigner–Seitz radius is defined as the radius of a spherical volume equivalent to the volume per atom in the solid, i.e. \(\frac{4}{3}\pi r_0^3=1/n_{\rm a}\) for a number density of atoms n a.
- 8.
- 9.
Note that figures 3.14 and 3.13 cannot be properly interpreted at lower values of the coupling \((\beta_{\rm p}/M_I \,\lesssim\, 1\,\hbox{ps}^{-1})\). The electronic stopping power was not included in simulations using a homogeneous thermostat (βs = 0) and so the impact of allowing the electrons to heat up is entangled with that of a higher average damping unless βp ≫ βs.
- 10.
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Race, C.P. (2011). The Treatment of Electronic Excitations in Atomistic Simulations of Radiation Damage—A Brief Review. In: The Modelling of Radiation Damage in Metals Using Ehrenfest Dynamics. Springer Theses. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-15439-3_3
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