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gavinray • today at 1:05 PM • 2 replies • view on HN

  > "a single layer of Bi2Sr2CuO6+δ (Bi-2201)"
I did not realize one could learn how much chemistry they did not know from a single name. "+δ" is one I've never seen before.

Replies

pfdietz • today at 2:14 PM

The material is doped by varying the overall oxidation state of the copper, which is balanced by the number of oxygen ions.

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