quantum Hall effect


quantum Hall effect

[′kwän·təm ′hȯl i‚fekt] (electronics) A phenomenon exhibited by certain semiconductor devices at low temperatures and high magnetic fields, whereby the Hall resistance becomes precisely equal to (h / e 2)/ n, where h is Planck's constant, e is the electronic charge, and n is either an integer or a rational fraction. Also known as von Klitzing effect.