Probing Spin-Charge Relation by Magnetoconductance in One-Dimensional Polymer Nanofibers
arXiv:1210.4638 · doi:10.1103/PhysRevB.86.155423
Abstract
Polymer nanofibers are one-dimensional organic hydrocarbon systems containing conducting polymers where the non-linear local excitations such as solitons, polarons and bipolarons formed by the electron-phonon interaction were predicted. Magnetoconductance (MC) can simultaneously probe both the spin and charge of these mobile species and identify the effects of electron-electron interactions on these nonlinear excitations. Here we report our observations of a qualitatively different MC in polyacetylene (PA) and in polyaniline (PANI) and polythiophene (PT) nanofibers. In PA the MC is essentially zero, but it is present in PANI and PT. The universal scaling behavior and the zero (finite) MC in PA (PANI and PT) nanofibers provide evidence of Coulomb interactions between spinless charged solitons (interacting polarons which carry both spin and charge).
References in corpus (7)
- Luttinger Liquid Behavior in Carbon Nanotubes
- One-dimensional transport in polymer nanofibers
- One-dimensional conduction in Charge-Density Wave nanowires
- Electron Transport in a Multi-Channel One-Dimensional Conductor: Molybdenum Selenide Nanowires
- Coulomb-blockade transport in quasi-one dimensional polymer nanofibers
- Unconventional magnetoresistance in long InSb nanowires
- Probing Spin-Charge Relation by Magnetoconductance in One-Dimensional Polymer Nanofibers