Abstract
To investigate the nature of the metal-insulator transition which takes place in $\mathrm{Ba}\mathrm{V}{\mathrm{S}}_{3}$ at ${T}_{\mathrm{MIT}}=70\phantom{\rule{0.3em}{0ex}}\mathrm{K}$, we study pure samples of $\mathrm{Ba}\mathrm{V}{\mathrm{S}}_{3}$ irradiated by fast electrons, which introduce point defects. Our results show that the metal-insulator transition is gradually weakened and shifted to lower temperatures by introducing the defects, in close analogy to systems where metal-insulator transition is due to a Peierls mechanism. Additionally, we study the influence of point defects on the temperature-pressure phase diagram of $\mathrm{Ba}\mathrm{V}{\mathrm{S}}_{3}$.
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