Activated transport in the v=1 bilayer quantum Hall states with small tunneling energy Delta(SAS)=1K
Activated transport in the v=1 bilayer quantum Hall states with small tunneling energy Delta(SAS)=1K
复制标题
v=1 双层量子霍尔态中的激活传输，具有小隧道能 Delta(SAS)=1K
DOI：
10.1088/1742-6596/400/4/042008
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发表时间：
2012
期刊：
影响因子：
--
通讯作者：
A. Sawada
中科院分区：
文献类型：
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作者：
A. Fukuda;D. Terasawa;T. Morikawa;Y.D. Zheng;T. Arai;Z.F. Ezawa;A. Sawada
利用GaAs/AlAs双量子阱结构进行了v= 1双层量子霍尔态（BQHS）的磁输运实验，隧穿能量为1 K。我们不仅关注BQHS的激活能的测量，还关注BQHS在大范围的总密度和层密度不平衡的起始温度的测量。我们发现，起始温度对总密度的依赖性不同于活化能。我们讨论的物理解释的起始温度与关系的有限温度相变的v= 1 BQHS。
We carried out magnetotransport experiments in the v= 1 bilayer quantum Hall state (BQHS) using a GaAs/AlAs double-quantum-well structure with tunneling energy as small as 1 K. We focus on measurements of not only activation energies but also onset temperatures of the BQHS for a wide range of the total density and the layer density imbalance. We have found that the dependency of onset temperature on the total density is different from that of the activation energy. We discuss physical interpretations of the onset temperature with relationship to finite-temperature phase transitions in the v= 1 BQHS.