Transition from laminar to vortical current flow in electron waveguides with circular bends
- 15 March 1993
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 47 (11) , 6390-6394
- https://doi.org/10.1103/physrevb.47.6390
Abstract
We have analyzed the spatial flow pattern in two-dimensional ballistic electron waveguides with circular bends. For a double bend the conductance may still be perfectly quantized in spite of the strong mixing of modes. In narrow energy regions just below the subband thresholds there is strong interference between localized and propagating solutions, causing an interference blockade. Within these regions the current flow becomes vortical. Minor changes in, e.g., energy cause drastic changes in the flow pattern.Keywords
This publication has 19 references indexed in Scilit:
- Bound states in twisting tubesPhysical Review B, 1992
- Effects of width increase in the ballistic quantum wirePhysical Review B, 1992
- Ballistic Transport in the Bent Quantum WireJournal of the Physics Society Japan, 1992
- Understanding quantum wires with circular bendsJournal of Applied Physics, 1992
- Transition from laminar to vortex flow in a model semiconductor nanostructurePhysica Scripta, 1992
- Ballistic current vortex excitations in electron waveguide structuresApplied Physics Letters, 1990
- Transmission through a bend in an electron waveguideApplied Physics Letters, 1990
- Circular bends in electron waveguidesPhysical Review B, 1990
- Evanescent modes and scattering in quasi-one-dimensional wiresPhysical Review B, 1990
- Bound states in curved quantum waveguidesJournal of Mathematical Physics, 1989