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Mar8-12, 09:22 AM
PF Gold
P: 2
I can see I was not specific enough in my original post. What I meant was heavy electrons associated with surface plasmons in metal that are an coherent quantum effect. They are called surface plasmon polaritons (SSP). They play an important role in Surface Enhanced Raman Spectroscopy (SERS).

Vanhees71 best described what I am looking for.

Thanks for all the posts.