In solid-state physics, the electron mobility characterises how quickly an electron can move through a metal or semiconductor when pushed or pulled by an electric field. There is an analogous quantity for holes, called hole mobility. … See more

Typical electron mobility at room temperature (300 K) in metals like gold, copper and silver is 30–50 cm /(V⋅s). Carrier mobility in semiconductors is doping dependent. In silicon (Si) the electron mobility is of the order of 1,000, in germanium around … See more

Recall that by definition, mobility is dependent on the drift velocity. The main factor determining drift velocity (other than effective mass) is scattering time, i.e. how long the carrier is See more

Hall mobility
Carrier mobility is most commonly measured using the Hall effect. The result of the measurement is called the "Hall mobility" (meaning … See more

Drift velocity in an electric field
Without any applied electric field, in a solid, electrons and holes move around randomly. … See more

At low fields, the drift velocity vd is proportional to the electric field E, so mobility μ is constant. This value of μ is called the low-field mobility.
As the electric field is … See more

While in crystalline materials electrons can be described by wavefunctions extended over the entire solid, this is not the case in systems with appreciable structural disorder, such as See more