Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
a, Ground state pearl and b, metastable domino structures of the asymmetric boundary at 0K. The two structures have the same number of atoms and correspond to two different translations of the bulk grains relative to each other.
