When you run an electric current (say, to the right), is that current made from positive charges (moving right) or negative charges (moving left)? In some materials, that depends on which direction the current flows. My new article in Nature News:https://www.nature.com/articles/s41563-019-0373-9 …
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apparently not to the National Science Foundation. I should lobby to have my *tweets* count as "investment in the community"
Thanks. Twitter will use this to make your timeline better. UndoUndo
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