Turing Patterns Turn Up in a Tiny Crystal

The stripes looked like a mistake. Several years ago, a team of physicists at Stanford University led by Aharon Kapitulnik was trying to grow a thin layer of bismuth crystal on a metallic surface. But instead of forming a uniform sheet, the crystal became a patchwork of uneven growth. In some areas — those where the crystal layer was only one atom thick — a striking design emerged.

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