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 |
| Publication status | Published - 1991 Dec 9 |
| Externally published | Yes |
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ASJC Scopus subject areas
- Physics and Astronomy(all)
Cite this
Magnetorotons in quasi-three-dimensional electron systems. / Karraï, K.; Ying, X.; Drew, H. D.; Santos, M.; Shayegan, M.; Yang, Sung Ryul; MacDonald, A. H.
In: Physical Review Letters, Vol. 67, No. 24, 09.12.1991, p. 3428-3431.Research output: Contribution to journal › Article
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TY - JOUR
T1 - Magnetorotons in quasi-three-dimensional electron systems
AU - Karraï, K.
AU - Ying, X.
AU - Drew, H. D.
AU - Santos, M.
AU - Shayegan, M.
AU - Yang, Sung Ryul
AU - MacDonald, A. H.
PY - 1991/12/9
Y1 - 1991/12/9
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=0345337514&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0345337514&partnerID=8YFLogxK
M3 - Article
AN - SCOPUS:0345337514
VL - 67
SP - 3428
EP - 3431
JO - Physical Review Letters
JF - Physical Review Letters
SN - 0031-9007
IS - 24
ER -