Posted on 12/10/2017 6:23:31 AM PST by BenLurkin
Scientists have proven the existence of new form of matter called excitonium – which was first theorised almost 50 years ago. Researchers from University of California Berkeley and University of Illinois at Urbana-Champaign in the US studied non-doped crystals of the transition metal dichalcogenide titanium diselenide (1T-TiSe2).
Excitonium is a condensate – it exhibits macroscopic quantum phenomena, like a superconductor. It is 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.
... 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 due to the collective behaviour of the surrounding crowd of electrons. However, that understanding makes the pairing no less strange and wonderful...
Until now, scientists have not had the experimental tools to positively distinguish whether what looked like excitonium was not in fact a Peierls phase. Peierls phases and exciton condensation share the same symmetry and similar observables.
Abbamonte and his team were able to overcome that challenge by using a novel technique they developed called momentum-resolved electron energy-loss spectroscopy (M-EELS). With their new technique, the group was able to measure collective excitations of the low-energy bosonic particles, the paired electrons and holes, regardless of their momentum.
(Excerpt) Read more at indianexpress.com ...
Dr. Sheldon Cooper and Dr. Leonard Hofstetter need to continue their research - - New seasons of The Big Bang series required??
Does that cause ‘excitis’, the infliction that has hit so many media people this week?
Joy Behar, for example, had a massive attack of ‘excitis’ — as the Brian Ross news implicated the Trump family in Russian collusion — only to find the allegation to be another empty hole based on false or fake data.
Her ‘excitis’ turned to ‘bitis-in-the-rear’, poor thang.
I’m not excited.
My diet in my 20s was chock full of excitonium. Now it’s mainly dullotonium and whocaresotonium.
You silver-tongued rake, you!
Hey, now, Unobtanium is real. My Oakley glasses are made of it.
Does this mean streaming will support Dolby Atmos now?
Words, words and more words.... semantic constructs rival the complexity of the world
When will the crowded with electrons violence stop? Shouldn’t we ban all assault particle acceleretors? If it saves one sub atomic particle...
LOL, I have to take the time to learn how to post pics.
Oh, wait. That was valence, not violence. Never mind.
I’ve thought about this since my first remark and had another cup of coffee.
I now believe that there is simply not enough coffee in the world to ever make me even mildly agitated about this let alone giddy.
Another study has shown that politicians are largely composed of morons, plutonium and grabitons. All of which eventually collapse into a dense body from which your rights and your money, once pulled into it, never return.
But when will they ever find the element of surprise?!
I need to check my calendar, is it April 1st?
I have been out of college chemistry for 35 years so perhaps someone more knowledgible than me can explain it.
That formula does not seem to fit that name if I remember my chemistry correctly.
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