In solid-state physics, crystal momentum or quasimomentum is a momentum-like vector associated with electrons in a crystal lattice. It is defined by the associated wave vectors k {\displaystyle \mathbf {k} } of this lattice, according to p crystal ≡ ℏ k {\displaystyle \mathbf {p} _{\text{crystal}}\equiv \hbar \mathbf {k} } (where ℏ {\displaystyle \hbar } is the reduced Planck constant).
In solid-state physics, crystal momentum or quasimomentum is a momentum-like vector associated with electrons in a crystal lattice. It is defined by the associated wave vectors k {\displaystyle \mathbf {k} } of this lattice, according to p crystal ≡ ℏ k {\displaystyle \mathbf {p} _{\text{crystal}}\equiv \hbar \mathbf {k} } (where ℏ {\displaystyle \hbar } is the reduced Planck constant).
Source: Wikipedia "Crystal momentum" · CC BY-SA 4.0
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