Solid State Physics Fundamentals
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Solid State Physics Fundamentals. Das Kronig -Penney-Modell. Periodisches Kristallpotential :. Kronig -Penney-Näherung:. Stationäre Schrödingergleichung :. Für V(x) = 0 folgt:. Für V(x) = V 0 :. Stetigkeitsbedingungen:. Periodizitätsbedingungen:.
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Solid State Physics Fundamentals
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Solid State PhysicsFundamentals Das Kronig-Penney-Modell
Periodisches Kristallpotential: Kronig-Penney-Näherung:
Für V(x) = 0 folgt: Für V(x) = V0:
Periodizitätsbedingungen: Bloch‘sches Theorem: In einem gitterperiodischen Potential gilt: woraus folgt:
(iii) und (iv) können als Matrizengleichung angegeben werden: charakteristische Gleichung:
Für 0 < E < V0: Für E > V0:
mit: bzw. folgt: für 0 < E < V0 für E > V0
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