silver wrote:
layman's explanation of title: he did a bunch of superconductivity experiments with a particular kind/class of crystal and drew some conclusions about why/how the electrons decided to pair up in those circumstances?
That's not bad! Superconductivity means that a material loses all electrical resistance at a certain temperature. Heavy fermion behavior means that the electrons in a material become very strongly correlated at low temperatures, and their effective masses become very strong, up to 1000 times the bare electron mass. When superconductivity occurs in these materials, it's not nearly as well understood as in more convential superconductors, but it is definitely related to how the electrons become correlated (the pairing mechanism is related, as silver implies). Finally, crystalline electric field (CEF) effects...well, that's a bit tougher to explain, basically the electric fields of atoms in a crystal lattice have an effect on a magnetic ion in the lattice.
So, we have this heavy fermion superconductor with CEF effects at low temperatures, PrOs
4Sb
12...and then this normal superconductor with CEF effects at high temperatures, PrRu
4Sb
12. The former compound is the first heavy fermion superconductor ever found based on Pr, and it acts differently than all other heavy fermion superconductors. So there's some interest in it, in certain circles of physics. I thus spent several years making new compounds by substituting Ru for Os, and seeing how the physical properties evolve between the two more well known end member compounds.
And now you know!
Game on,
____________________________
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He who is certain he knows the ending of things when he is only beginning them is either extremely wise or extremely foolish; no matter which is true, he is certainly an
unhappy man, for he has put a knife in the heart of wonder."
-- Tad Williams