Klein paradox

Discovered by physicist Oskar Klein in 1929.

Klein paradox (plural Klein paradoxes)

1. (quantum mechanics) A surprising result of applying the Dirac equation to the problem of electron scattering from a potential barrier. In non-relativistic quantum mechanics, electron tunnelling into a barrier is observed, with exponential damping. However, if the potential is of the order of the electron mass, ${\displaystyle V\sim mc^{2}}$, the barrier is nearly transparent; moreover, as the potential approaches infinity, the reflection diminishes and the electron is always transmitted.

• Klein tunnelling, Klein tunneling
• Klein zone