Electron transport in suspended semiconductor structures with two-dimensional electron gas

被引：22
|
作者：
Pogosov, A. G. [1 ,2 ]
Budantsev, M. V. [1 ,2 ]
Zhdanov, E. Yu. [1 ,2 ]
Pokhabov, D. A. [1 ,2 ]
Bakarov, A. K. [1 ]
Toropov, A. I. [1 ]
机构：
[1] SB RAS, Inst Semicond Phys, Novosibirsk 630090, Russia
[2] Novosibirsk State Univ, Novosibirsk 630090, Russia
来源：
APPLIED PHYSICS LETTERS | 2012年 / 100卷 / 18期
关键词：
QUANTUM; MAGNETOTRANSPORT; BREAKDOWN; BLOCKADE;
D O I：
10.1063/1.4709485
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
We study electron transport in suspended semiconductor microstructures fabricated from AlAs/GaAs membranes containing a high mobility two-dimensional electron gas. In quantizing magnetic fields, a reflection of edge current channels from the border of suspended area is observed resulting in the absence of vanishing magnetoresistance in the quantum Hall effect (QHE) regime. Relocation of this border out of the Hall bar revives the QHE. We have also found that the critical current of the breakdown of QHE in suspended samples is three times lower than in non-suspended samples due to the peculiarity of heat transport in the membranes. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4709485]
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页数：3
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