Many-body effects in a quasi-one-dimensional electron gas
arXiv:1411.5855 · doi:10.1103/PhysRevB.90.201304
Abstract
We have investigated electron transport in a quasi-one dimensional (quasi-1D) electron gas as a function of the confinement potential. At a particular potential configuration, and electron concentration, the ground state of a 1D quantum wire splits into two rows to form an incipient Wigner lattice. It was found that application of a transverse magnetic field can transform a double-row electron configuration into a single-row due to magnetic enhancement of the confinement potential. The movements of the energy levels have been monitored under varying conditions of confinement potential and in-plane magnetic field. It is also shown that when the confinement is weak, electron occupation drives a reordering of the levels such that the normal ground state passes through the higher levels. The results show that the levels can be manipulated by utilising their different dependence on spatial confinement and electron concentration, thus enhancing the understanding of many body interactions in mesoscopic 1D quantum wires.
14 pages, 3 figures
References in corpus (6)
- A one-dimensional liquid of fermions with tunable spin
- Probing spin-charge separation in a Tomonaga-Luttinger liquid
- Wigner crystal physics in quantum wires
- Incipient Formation of an Electron Lattice in a Weakly-Confined Quantum Wire
- Row coupling in an interacting quasi-one-dimensional quantum wire investigated using transport measurements
- Spin coupling in zigzag Wigner crystals