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a a=n p

a a=n p. mehrwertig. symmetrisch. periodisch. a a. F = ( G / a a )sin( a a )+cos( a a )=cos( ka ). ka = arccos( F ). E =( a a ) 2 /2. -1. +1. E periodisch: E( ka )=E( ka+2 p ). E symmetrisch: E( ka )=E(- ka ). Erste Brillouinsche Zone.

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a a=n p

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  1. aa=np

  2. mehrwertig symmetrisch periodisch

  3. aa F= (G/aa)sin(aa)+cos(aa)=cos(ka) ka= arccos(F ) E=(aa)2/2 -1 +1

  4. E periodisch: E(ka)=E(ka+2p) E symmetrisch: E(ka)=E(-ka) Erste Brillouinsche Zone

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