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.
電子工程學系及電子研究所
奈米科技中心
Department of Electronics Engineering and Institute of Electronics
Center for Nanoscience and Technology
關鍵字: edge magnetoplasma;quantum wire;microwave;quantum Hall effect
公開日期: 1-Mar-2008
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.
URI: http://dx.doi.org/10.1016/j.physe.2007.10.110
http://hdl.handle.net/11536/30076
ISSN: 1386-9477
DOI: 10.1016/j.physe.2007.10.110
期刊: PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES
Volume: 40
Issue: 5
起始頁: 1681
結束頁: 1683
Appears in Collections:Conferences Paper


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