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|標題:||Edge magnetoplasma excitations in quantum wire arrays||作者:||Hsieh, W.H.
|關鍵字:||edge magnetoplasma;quantum wire;microwave;quantum Hall effect;microwave conductivity;magnetic-field||Project:||Physica E-Low-Dimensional Systems & Nanostructures||期刊/報告no：:||Physica E-Low-Dimensional Systems & Nanostructures, Volume 40, Issue 5, Page(s) 1681-1683.||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.
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