Given a material sample, what are the different experiments that one can perform on it to check if it's a conductor or a semiconductor. For eg, we can measure R at different temperatures. Anything else we can do?
Semiconductors have 4 electrons in their valence shell.So,what usually is done is gating or perhaps doping to make it either a n-type or a p-type.SO,the material which responds to such techniques would have an increased conductivity.Moreover,why concentrate on the temperature? You do realize that certain semiconductors have excited electrons which relax by emitting light rather than heat(eg- the ones used in LEDs).