Confined magnetic guiding orbit states
Departement Natuurkunde, Universiteit
Antwerpen (UIA) Universiteitsplein 1, B-2610 Antwerpen,
2 Department of Physics, Concordia University - 1455 de Maisonneuve Ouest Montréal, Québec Canada, H3G1M8
Accepted: 14 June 2002
We show how snake-orbit states which run along a magnetic edge can be confined electrically. We consider a two-dimensional electron gas (2DEG) confined into a quantum wire, subjected to a strong perpendicular and steplike magnetic field B/. Close to this magnetic step, new, spatially confined bound states arise as a result of the lateral confinement and the magnetic-field step. The number of states, with energy below the first Landau level, increases as B becomes stronger or as the wire width becomes larger. These bound states can be understood as an interference between two counter-propagating one-dimensional snake-orbit states.
PACS: 73.20.-r – Electron states at surfaces and interfaces / 73.23.-b – Electronic transport in mesoscopic systems / 73.40.-c – Electronic transport in interface structures
© EDP Sciences, 2002