Direct pairing of electrons

Abstract

The pairing occurs when electrons tunnel through the Coulomb barrier to the region of the dominant values of their spin-spin interaction energy. In an external electrostatic field the pair rotates in the plane orthogonal to the field strength vector and its centre-of-mass tends to be pushed out from the field along this plane. Applying an rf electric field causes an experimentally observed resonance absorption of its energy at a frequency equal to that of the pair's rotation, and is linear in the electrostatic field strength.