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Results tagged with condensed-matter
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user 77326
The study of physical properties of condensed phases of matter, including solids and liquids.
7
votes
1
answer
977
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Why spin-$1/2$ objects don't have quadrupolar magnetic moment?
I'm asking myself more generally why a spin of size $S$ will feature multipolar states of degrees $k$ up to $2S$?
(This implies the question in the title: spin-$1/2$ can't have any quadrupolar contrib …
- 364
3
votes
1
answer
2k
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How the electron delocalization can lower its kinetic energy?
In covalent bonding, as in metallic bonding, the lowering in energy relative to the free-atom state is achieved by the reduction in the kinetic energy of valence electrons due to their delocalization. …
- 364
1
vote
0
answers
265
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How does the Wigner-Eckart theorem rule Multipole Expansion?
I am wondering why a spin-S particle have only the term up to $k=2S$ in his multipole expansion ?
It seems that the Wigner-Eckart theorem shows the relation between spin and multipole expansion but I …
- 364