Abstract
Theoretical work is presented, suggesting that in regimes of experimental interest, the exchange enhancement of the spin splitting of Landau levels in quantum wires as evidenced in their two-terminal conductance is increased by the confinement. This is due to an effect in which electron-electron interactions are strengthened by interaction with polarizable edge-state charge. This antiscreening effect is confirmed by calculating exchange enhancement in a quasi-one-dimensional conductor in the ‘‘screened’’ Hartree-Fock approximation. Preliminary experimental evidence for the effect is also presented.
- Received 2 December 1991
DOI:https://doi.org/10.1103/PhysRevB.45.13431
©1992 American Physical Society