How to calculate the conductivity in the depletion region of semiconductor under an applied bias voltage?

Question

anonymous · Answer

I'm sure I know, but I just can't remember.

radar · Answer

Sounds like it would have to be measured rather than calculated unless you are provided with the required parameters.

anonymous · Answer

what i want to know is that the relation of the conductivity and  the required parameters. But i did't know what are the required parameters.

radar · Answer

What kind of device is this semiconductor?  bipolar transistor, mosfet etc.??

anonymous · Answer

it's just a metal-semiconductor(doped GaAs) contact.

radar · Answer

I'm sure the resistance of the depletion region will vary depending on the size of the depletion region which of course depends on the bias voltage.  This sounds like a dynamic thing a would involve more than connecting an ohmmeter (which will also apply a voltage).  Are you taking a course in physics, if so I would advise some conversation with the instructor.  I wouldn't know how to calculate it, but temperature, bias voltage, degree of impurities would be some things that would have to be known.

anonymous · Answer

thanks very much