The core band is not a type of electronic band structure. The conduction band, valence band, and forbidden gap are all types of electronic band structures.

The energy difference between the conduction band and the valence band is called the band gap.

Copper is a good conductor of electricity because it has a low resistivity, which means that it allows electrons to flow easily.

Silicon is a semiconductor because it has a band gap that is small enough to allow electrons to be excited from the valence band to the conduction band.

The process by which electrons are excited from the valence band to the conduction band is called band gap.

Doping a semiconductor with an impurity atom changes the band gap, which in turn affects the conductivity of the semiconductor.

A diode is a type of semiconductor device that allows current to flow in one direction but not the other.

A transistor is a type of semiconductor device that can amplify signals.

Conductivity is a type of electronic property that describes the ability of a material to conduct electricity.

The SI unit of conductivity is Siemens per meter (S/m).

Silver has the highest conductivity of all metals.

The conductivity of a metal decreases with increasing temperature.

Type I, Type II, and BCS are all types of superconductors.

The critical temperature of a superconductor is the temperature at which it becomes superconducting.

Superconductors are used in a variety of applications, including magnetic resonance imaging (MRI), particle accelerators, and high-speed trains.