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Ground-state path integral Monte Carlo simulations of positive ions in $^4$He clusters: bubbles or snowballs? | | Stefano Paolini
; Francesco Ancilotto
; Flavio Toigo
; | | Date: |
10 Jan 2007 | | Subject: | Other | | Abstract: | The local order around alkali (Li$^+$ and Na$^+$) and alkaline-eath (Be$^+$, Mg$^+$ and Ca$^+$) ions in $^4$He clusters has been studied using ground-state path integral Monte Carlo calculations. We apply a criterion based on multipole dynamical correlations to discriminate between solid-like versus liquid-like behavior of the $^4$He shells coating the ions. As it was earlier suggested by experimental measurements in bulk $^4$He, our findings indicate that Be$^+$ produces a solid-like ("snowball") structure, similarly to alkali ions and in contrast to the more liquid-like $^4$He structure embedding heavier alkaline-earth ions. | | Source: | arXiv, cond-mat/0701215 | | Services: | Forum | Review | PDF | Favorites | |
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