The spin-orbit mechanism of electron pairing in quantum wires

Abstract

We solve a two-body problem for electrons in a one-dimensional system to show that two-electron bound states can arise as a result of the image-potential-induced spin-orbit interaction (iSOI). The iSOI contributes an attractive component to the electron-electron interaction Hamiltonian that competes with the Coulomb repulsion and overcomes it under certain conditions. We find that there exist two distinct types of two-electron bound states, depending on the type of the motion that forms the iSOI: the relative motion or the motion of the electron pair as a whole. The binding energy lies in the meV range for realistic material parameters and is tunable by the gate potential.

arXiv comment4 pages, 2 figures

References in corpus (5)

• New Perspectives for Rashba Spin-Orbit Coupling
• Modern trends in Superconductivity and Superfluidity. Chapters 11, 13
• Image-potential-induced spin-orbit interaction in one-dimensional electron systems
• Dynamic transport in a quantum wire driven by spin-orbit interaction
• Dynamics of one-dimensional electrons with broken spin-charge separation

Cited by in corpus (9)

• Spin-orbit-driven electron pairing in two dimensions
• Pair spin-orbit interaction in low-dimensional electron systems
• Coulomb pairing of electrons in thin films with strong spin-orbit interaction
• Electron correlations due to pair spin-orbit interaction in 2D electron systems
• Spin-dependent electron-electron interaction in Rashba materials
• Electron pairs bound by the spin-orbit interaction in 2D gated Rashba materials with two-band spectrum
• Electron Interactions in Rashba Materials
• Bound electron pairs formed by the spin-orbit interaction in 2D gated structures
• The Coulomb impurity in 2D materials with strong spin-orbit interaction