|標題:||Edge magnetoplasma excitations in quantum wire arrays|
|作者:||Hsieh, W. H.|
Suen, Y. W.
Lee, B. C.
Li, L. C.
Lee, C. P.
Department of Electronics Engineering and Institute of Electronics
Center for Nanoscience and Technology
|關鍵字:||edge magnetoplasma;quantum wire;microwave;quantum Hall effect|
|摘要:||We report the low-temperature microwave properties of edge magneto-plasma excitations in quantum-wire arrays, fabricated from a two-dimensional electron gas in a GaAs/AlGaAs heterostructure and embedded in the slots of a 50-Omega meandering coplanar waveguide. The plot of frequency versus Landau level filling factors with strong absorption gives a series of barn-shaped curves with tops being centered in the quantum Hall effect plateaus and following a straight line through the origin. Away from the plateau center, the absorption dip becomes weaker and disappears near the plateau-plateau transition regime, qualitatively following the magneto hydrodynamic model. At frequencies above this barn-shaped part, however, we also observed unexpected resonant dips. (c) 2007 Published by Elsevier B.V.|
|期刊:||PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES|
|Appears in Collections:||Conferences Paper|
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