Josephson constant

Josephson constant

[′jō·sef·sən ‚kän·stənt]
(physics)
The quantity KJ = 2 e/h, which appears in the equations for the alternating-current Josephson effect, where e is the magnitude of the charge of the electron and h is Planck's constant.
The conventional value of this quantity adopted by international agreement on January 1, 1990, to establish a standard for the volt, KJ-90= 493,597.9 gigahertz per volt.
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References in periodicals archive ?
The last three constants are determined by other means, but are included since they are used in some of the other determinations Constant Symbol Planck constant h Josephson constant (SI) [K.
These include the Josephson constant, the charge and mass of the electron, and the Avogadro constant [2].
J] = 2e/h is the Josephson constant determined by the Plank constant h and the elementary charge e.
When the CCE recommended international acceptance of the value of the Josephson constant [K.