Electronic states and collective excitations of a two-dimensional electron gas in a unidirectional magnetic-field modulation
- 15 March 1993
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 47 (12), 7182-7186
- https://doi.org/10.1103/physrevb.47.7182
Abstract
We study a two-dimensional (2D) electron gas in the presence of a spatially modulated magnetic field. It is found that the 2D electron gas displays a trend of forming an array of 1D-like structures as the amplitude or spatial period of the modulation field increases. This is most evidently seen in the electron-density distribution of the system. The self-consistent potential, which arises from the modulation-induced nonuniform electron-density distribution, is included in the calculation, and found to weaken this 2D-to-1D-like transition, in competition with the magnetic-field modulation. The collective excitation spectra are calculated in this regime for different system parameters.Keywords
This publication has 28 references indexed in Scilit:
- Electron pinball and commensurate orbits in a periodic array of scatterersPhysical Review Letters, 1991
- One-dimensional plasmons in AlGaAs/GaAs quantum wiresPhysical Review Letters, 1991
- Magnetoresistance oscillations in a grid potential: Indication of a Hofstadter-type energy spectrumPhysical Review B, 1991
- Magnetoresistance of a two-dimensional electron gas in a strong periodic potentialPhysical Review B, 1990
- Temperature dependence of magnetoresistance oscillations in a two-dimensional electron gas subjected to a periodic potentialPhysical Review B, 1990
- Transport in a superlattice of 1D ballistic channelsJournal of Physics: Condensed Matter, 1990
- Dimensional excitations in narrow electron inversion channels on SiPhysical Review B, 1989
- Landau band conductivity in a two-dimensional electron system modulated by an artificial one-dimensional superlattice potentialPhysical Review Letters, 1989
- Novel magnetoresistance oscillations in a periodically modulated two-dimensional electron gasPhysical Review Letters, 1989
- Intersubband resonance in quasi one-dimensional inversion channelsPhysical Review Letters, 1987