Helium impurities and interactions in lithium

We investigate helium interactions with lithium using density functional theory. Like other body-centered cubic (bcc) metals, the lowest-energy site for interstitial is a tetrahedral site. However, in shows higher substitutional formation energy than either or octahedral energies, which unique. The calculated migration energies of are also very low (∼ 1 meV), an order magnitude lower those bcc metals. find increase binding to vacancy as number atoms bound it increases. extremely suggest that transport will be fast.