| Issue |
Europhys. Lett.
Volume 46, Number 3, May I 1999
|
|
|---|---|---|
| Page(s) | 395 - 400 | |
| Section | Condensed matter: electronic structure, electrical, magnetic and optical properties | |
| DOI | https://doi.org/10.1209/epl/i1999-00274-6 | |
| Published online | 01 September 2002 | |
Repulsion of fundamental edge magnetoplasmons at integer filling factors and nonlocal responses
1
Concordia University, Department of Physics
1455 de Maisonneuve Blvd O, Montréal, Québec, Canada, H3G
1M8
2
Institute of Semiconductor Physics, National
Academy of Sciences
45 Pr. Nauky, Kiev 252650, Ukraine
Received:
7
August
1998
Accepted:
17
February
1999
A microscopic treatment of edge magnetoplasmons (EMPs) is
presented for strong magnetic fields, low temperatures, integer
filling factors ν, and confining potentials that allow
Landau-level (LL) flattening to be neglected. Local and nonlocal
contributions to the current density are included. The effect of
nonlocality on the fundamental EMPs is weak while other modes can be
substantially affected. For 
nonlocal responses
result in a dipole mode with dispersion relation 
. For 
, inter-LL Coulomb coupling leads to a strong
repulsion of the uncoupled, fundamental LL modes.
PACS: 73.20.Mf – Collective excitations (including plasmons and other charge-density excitations) / 73.40.Hm – Quantum Hall effect (integer and fractional) / 71.70.Di – Landau levels
© EDP Sciences, 1999
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