Metastable electron-pair states in a two-dimensional crystal

Abstract

We study possible quantum states of two correlated electrons in a two-dimensional crystal and find a metastable energy band of the electron pair between the two lowest single-electron bands. These metastable states result from the interplay of electron correlations and the strength of the crystal potential. The two paired electrons are bound in the same unit cell in relative coordinates with an average distance between them about one third of the crystal period. Furthermore, we show how such electron-pairs can be stabilized in a many-electron system.

5 pages, 3 figures

References in corpus (3)

• Repulsively bound atom pairs in an optical lattice
• Coherent shift of localized bound pair in Bose Hubbard model
• Electron pairing in periodic potentials under an external electric field

Cited by in corpus (4)

• Two-body problem for two-dimensional electrons in Bernervig-Hughes-Zhang model
• Effective Mass of Bound Electron Pairs in Two-Dimensional Materials with a Gapped Band Spectrum
• Radiative Decay of Bound Electron Pairs in Two-Dimensional Topological Insulators
• Hamiltonian of a many-electron system with single-electron and electron-pair states in a two-dimensional periodic potential