Definition of Cooper pair in English:

Cooper pair

Syllabification: Coo·per pair
Pronunciation: /ˈko͞opər, ˈko͝opər


  • 1A loosely bound pair of electrons with opposite spins and moving with the same speed in opposite directions, held to be responsible for the phenomenon of superconductivity.
    More example sentences
    • In that model, pairs of electrons with opposite spin form so-called Cooper pairs with zero total spin.
    • Electrons in these Cooper pairs have opposite values of momentum, meaning that the pairs themselves generally have zero orbital angular momentum.
    • These electron pairs are called Cooper pairs, and as described by Schrieffer, they condense into a single state and flow as a totally directionless fluid.
  • 1.1A loosely bound pair of atoms in a superfluid.
    More example sentences
    • Just as in Bose-Einstein condensation, the Cooper pairs can fall into a single quantum state and thus cause a phase transition to a superconducting or superfluid phase.
    • Similarly, it is very unlikely for singlet superconductivity to appear in the ferromagnetic state because the exchange interaction forbids the formation of Cooper pairs.
    • One potential source of such particles is the stream of conjoined electrons that exist in superconductors, but no one has been able to drive a wedge between these so-called Cooper pairs.


1960s: named after Leon N. Cooper (born 1930), American physicist.

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