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Solid-state physics studies how macroscopic properties of solids (mechanical, electrical, optical, etc.) result from their microscopic structure. It usually deals with the scale where quantum properties of the particles are substantial.

10 votes
2 answers
2k views

Flat bands and localization in real space

When reading this paper I came across the following claim: From a band-theory point of view, the flat bands should have localized wavefunction profiles in real space Is there a rigorous proof of thi …
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10 votes
1 answer
3k views

Tight-binding vs. nearly free electron (NFE) model predictions

I came across the following problem: Suppose that a certain material consists of $N$ atoms that are ordered in a 2D lattice with a lattice constant $a$, and that each atom donates two conduction elec …
grjj3's user avatar
  • 695