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Excitonium is a condensate—it exhibits macroscopic quantum phenomena, like a superconductor, or superfluid, or insulating electronic crystal. It’s made up of excitons, particles that are formed in a very strange quantum mechanical pairing, namely that of an escaped electron and the hole it left behind.
It defies reason, but it turns out that when an electron, seated at the edge of a crowded-with-electrons valence band in a semiconductor, gets excited and jumps over the energy gap to the otherwise empty conduction band, it leaves behind a “hole” in the valence band. That hole behaves as though it were a particle with positive charge, and it attracts the escaped electron. When the escaped electron with its negative charge, pairs up with the hole, the two remarkably form a composite particle, a boson—an exciton.
In point of fact, the hole’s particle-like attributes are attributable to the collective behavior of the surrounding crowd of electrons. But that understanding makes the pairing no less strange and wonderful.
“This result is of cosmic significance,” affirms Abbamonte. “Ever since the term ‘excitonium’ was coined in the 1960s by Harvard theoretical physicist Bert Halperin, physicists have sought to demonstrate its existence. Theorists have debated whether it would be an insulator, a perfect conductor, or a superfluid—with some convincing arguments on all sides. Since the 1970s, many experimentalists have published evidence of the existence of excitonium, but their findings weren’t definitive proof and could equally have been explained by a conventional structural phase transition.”
physics.illinois.edu...
originally posted by: gortex
Now I don't claim to understand this but it seems exciting , and weird .
With their new technique, the group was able for the first time to measure collective excitations of the low-energy bosonic particles, the paired electrons and holes, regardless of their momentum. More specifically, the team achieved the first-ever observation in any material of the precursor to exciton condensation, a soft plasmon phase that emerged as the material approached its critical temperature of 190 Kelvin. This soft plasmon phase is “smoking gun” proof of exciton condensation in a three-dimensional solid and the first-ever definitive evidence for the discovery of excitonium.
originally posted by: gortex
a reply to: Malevotronic
Here's the explanation.
"With their new technique, the group was able for the first time to measure collective excitations of the low-energy bosonic particles, the paired electrons and holes, regardless of their momentum. More specifically, the team achieved the first-ever observation in any material of the precursor to exciton condensation, a soft plasmon phase that emerged as the material approached its critical temperature of 190 Kelvin. This soft plasmon phase is “smoking gun” proof of exciton condensation in a three-dimensional solid and the first-ever definitive evidence for the discovery of excitonium."
I think that clears it up.
originally posted by: Soylent Green Is People
It seems to me the obvious question is whether they can use this stuff to power a Turboencabulator.
originally posted by: Blue Shift
My own crazy theory is that our Periodic Table of Elements is obviously missing some huge pieces, and these may someday be filled with variations of matter that have multi-dimensional properties that link them together in some very subtle ways. My thought is that the complete Periodic Table of Elements will someday be shown as a three-dimensional structure (since we still have trouble representing multi-dimensional objects in 3-D space) with indications of extended dimensionality shown in some of the newly discovered pieces. Some of the elements might not even actually exist in our 3-D reality, but will be inferred from the PTOE structure.
I wish I was smart enough to put it together, but I'm not. They're going to have to be a mathematician who is also good at 3-D puzzles.
originally posted by: Blue Shift
My own crazy theory is that our Periodic Table of Elements is obviously missing some huge pieces, and these may someday be filled with variations of matter that have multi-dimensional properties that link them together in some very subtle ways. My thought is that the complete Periodic Table of Elements will someday be shown as a three-dimensional structure (since we still have trouble representing multi-dimensional objects in 3-D space) with indications of extended dimensionality shown in some of the newly discovered pieces. Some of the elements might not even actually exist in our 3-D reality, but will be inferred from the PTOE structure.
I wish I was smart enough to put it together, but I'm not. They're going to have to be a mathematician who is also good at 3-D puzzles.
originally posted by: madmac5150
Now, if we could just figure out "unobtanium".
THAT would be something