Metastable electron-electron states in double-layer graphene structures
Shytov, A.V.; Marnham, Lachlan L.
Date: 7 August 2015
Article
Journal
Physical Review B
Publisher
American Physical Society
Publisher DOI
Related links
Abstract
The prototypical exciton model of two interacting Dirac particles in graphene was analyzed in J. Sabio
et al., Phys. Rev. B 81, 045428 (2010) and it was found that in one of the electron-hole scattering channels the
total kinetic energy vanishes, resulting in a singular behavior. We show that this singularity can be removed by
extending ...
The prototypical exciton model of two interacting Dirac particles in graphene was analyzed in J. Sabio
et al., Phys. Rev. B 81, 045428 (2010) and it was found that in one of the electron-hole scattering channels the
total kinetic energy vanishes, resulting in a singular behavior. We show that this singularity can be removed by
extending the quasiparticle dispersion, thus breaking the symmetry between upper and lower Dirac cones. The
dynamics of an electron-electron pair are then mapped onto that of a single particle with negative mass and
anisotropic dispersion. We show that the interplay between dispersion and repulsive interaction can result in the
formation of bound, Cooper-pair-like, metastable states in double-layered hybrid structures.
Physics and Astronomy
Faculty of Environment, Science and Economy
Item views 0
Full item downloads 0