Two-electron state in a disordered 2D island: pairing caused by the Coulomb repulsion

Abstract

We show the existence of bound two-electron states in an almost depleted two-dimensional island. These two-electron states are carried by special compact configurations of four single-electron levels. The existence of these states does not require phonon mediation, and is facilitated by the disorder-induced potential relief and by the electron-electron repulsion only. The density of two-electron states is estimated and their evolution with the magnetic field is discussed.

9 pages, 1 fig

References in corpus (1)

• Pair Tunneling in Semiconductor Quantum Dots

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