Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
9789717 | Physica E: Low-dimensional Systems and Nanostructures | 2005 | 6 Pages |
Abstract
We study a non-adiabatic excitation of an electron system in a 1D quantum ring radiated by a short terahertz pulse. The response of two models, a continuous and a discrete, is explored. By introducing a spatial asymmetry in the external perturbation, a net current can be generated in the ring at a zero magnetic field. Effect of impurities and ratchets are investigated in combination with symmetric and asymmetric external excitation.
Related Topics
Physical Sciences and Engineering
Materials Science
Electronic, Optical and Magnetic Materials
Authors
Sigridur Sif Gylfadottir, Marian NiÅ£Ä, Vidar Gudmundsson, Andrei Manolescu,