# Electron-hole overlap integral for a quantum well

#### skyboarder2

Hi, I need some help to work out the electron-hole overlap integral Mnn' for a quantum well:
Knowing that M'nn'=$$\int$$$$\varphi$$*en'(z).$$\varphi$$hn(z).dz
=> How can I show that Mnn' is unity if n=n' and zero otherwise (in a quantum well with infinite barriers) ?
=> How can I show that Mnn' is zero if (n-n') is an odd number in a quantum well with finite barriers) ?

Thanks a lot
S.

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