Abstract
The dispersion relation for magnetoplasmons propagating perpendicular to the magnetic field is investigated for a quasi-three-dimensional electron system. The magnetic field is in the plane of a 100-nm-wide electron slab which is confined by a wide AlxGa1-xAs parabolic quantum well. A minimum is found in the magnetoplasma dispersion relation indicating the existence of a magnetoroton excitation for wave vector q about twice the inverse magnetic length. Calculations of the dispersion relation within the single-mode approximation are in good qualitative agreement with the measurements.
| Original language | English |
|---|---|
| Pages (from-to) | 3428-3431 |
| Number of pages | 4 |
| Journal | Physical review letters |
| Volume | 67 |
| Issue number | 24 |
| DOIs | |
| Publication status | Published - 1991 |
ASJC Scopus subject areas
- Physics and Astronomy(all)
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Cite this
Karraï, K., Ying, X., Drew, H. D., Santos, M., Shayegan, M., Yang, S. R. E., & MacDonald, A. H. (1991). Magnetorotons in quasi-three-dimensional electron systems. Physical review letters, 67(24), 3428-3431. https://doi.org/10.1103/PhysRevLett.67.3428