1DTOPO 3 (IMAGE)

Rice University

1DTOPO 3

Caption

Electrical conduction on the surface of rectangular crystals of the topological insulator bismuth iodide (Bi4I4) is depicted by pink and green arrows. Rice University physicists discovered conduction transitions from a 2D surface on four sides of the crystals (upper right) to 1D edges of those sides (upper left) due to a subtle shift in the material's crystal lattice (bottom, right to left) when the material is cooled to a critical temperature around 80 degrees Fahrenheit.

Credit

Jianwei Huang/Rice University

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