Excitonium

Quantum science is a pseudo science

any idea on how to explain the band gap. The nearly free electron model with 2 atoms i get, and how different energies come to be i get aswell. But then it starts to extrapolate to N atoms, and it gets very fuzzy on how you get those N different energies. They don't show it explicitely and the 2 atom model wants those 2 atoms next to eachother, in the case of N atoms this can no longer be so. How to explain the band gap?
hijacking this thread senpai

So it's just a fudge variable. Good to know.
Next.

No, I wouldn't say that it is. I don't know what you even mean by that in this context. Quasiparticles extend far beyond holes, and are quite well described by theoretical physics. However, I am not a theoretical physicist so I just take their word for it. I'm sure you can find much more on this by looking up courses/books on theoretical quantum matter or similar.

Atomic/molecular orbitals overlap. Not every atom has to be close to every other atom. For example, if you have two different 2-atom systems that form hybrid orbitals and then bring them close to each other, the hybrid orbitals will overlap and hybridise further. Different bands arise from different atomic orbitals overlapping. Some regions in energy do not fall within any of the bands, hence band gaps.

Really, this stuff is at least a course in itself and well described by many introductory condensed matter courses.

I like how nobody knows what this great "discovery" is about
But the tabloids keep writing about it, the more confusing the more redit golds it gets

Thanks for explaining, it's not that I didn't get the basic gist of it, but
> For example, if you have two different 2-atom systems that form hybrid orbitals and then bring them close to each other, the hybrid orbitals will overlap and hybridise further.
this made me realise that if you take 2 2-atom systems, their energies are going to be degenerate, and then you'll get that hybridization. Really, sometimes it's just a basic thing you need to be remembered about to know what's going on again
thanks mate

T-thanks for fixing me.

No problem. It does annoy me that, as is so often the case when trying to explain something to someone else, I find that my own understanding has gaps where gaps shouldn't be. Maybe someone else can elaborate where I have waved my hands and told you to look elsewhere.

Actually I enjoy this to be honest. A chance to finding gaps means a deeper understanding about the subject.