Quantum Hall Mach-Zehnder interferometer far beyond equilibrium
Quantum Hall Mach-Zehnder interferometer far beyond equilibrium
复制标题
远远超出平衡状态的量子霍尔马赫曾德干涉仪
DOI：
10.1103/physrevb.84.235313
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发表时间：
2011
影响因子：
3.7
通讯作者：
L. Sorba
中科院分区：
文献类型：
--
作者：
E. Deviatov;A. Ganczarczyk;A. Lorke;G. Biasiol;L. Sorba
我们通过实验实现了远非平衡态下运行的量子霍尔马赫 - 曾德尔干涉仪。该干涉仪的运行基于在同向传播的边缘态之间高度不平衡的情况下，同一朗道子能级内允许的边缘内弹性跃迁。由于每个边缘态都明确与特定的朗道子能级相关联，干涉回路的形成可以理解为单个边缘态的分裂和进一步重新连接。我们甚至在小型干涉仪中也观察到了阿哈罗诺夫 - 玻姆型干涉图案。这种新颖的干涉方案即使在毫伏级的不平衡下也显示出高可见度，并且在较宽的温度范围内都能存在。
We experimentally realize quantum Hall Mach-Zehnder interferometer which operates far beyond the equilibrium. The operation of the interferometer is based on allowed intra-edge elastic transitions within the same Landau sublevel in the regime of high imbalances between the co-propagating edge states. Since the every edge state is definitely connected with the certain Landau sublevel, the formation of the interference loop can be understood as a splitting and a further reconnection of a single edge state. We observe an Aharonov-Bohm type interference pattern even for low-size interferometers. This novel interference scheme demonstrates high visibility even at millivolt imbalances and survives in a wide temperature range.