Spin-orbit excitations of quantum wells
Superconductivity
2015-05-18 v1 Strongly Correlated Electrons
Abstract
Confinement asymmetry effects on the photoabsorption of a quantum well are discussed by means of a sum-rules approach using a Hamiltonian including a Rashba spin-orbt coupling. We show that while the strength of the excitation is zero when the spin-orbit coupling is neglected, the inclusion of the spin-orbit interaction gives rise to a non zero strength and mean excitation energy in the far-infrared region. A simple expression for these quantities up to the second order in the Rashba parameter was derived. The effect of two-body Coulomb interaction is then studied by means of a Quantum Monte Carlo calculation, showing that electron-electron correlations induce only a small deviation from the independent particle model result.
Cite
@article{arxiv.1003.2433,
title = {Spin-orbit excitations of quantum wells},
author = {A. Ambrosetti and J. M Escartin and E. Lipparini and F. Pederiva},
journal= {arXiv preprint arXiv:1003.2433},
year = {2015}
}