Quantum Hall Mach-Zehnder interferometer at fractional filling factors
Quantum Hall Mach-Zehnder interferometer at fractional filling factors
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DOI:
10.1209/0295-5075/100/67009
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发表时间:
2012-12-01
期刊:
影响因子:
1.8
通讯作者:
Sorba, L.
中科院分区:
文献类型:
--
作者:
Deviatov, E. V.;Egorov, S. V.;Sorba, L.
We use a Mach-Zehnder quantum Hall interferometer of a novel design to investigate the interference effects at fractional filling factors. Our device brings together the advantages of usual Mach-Zehnder and Fabry-Perot quantum Hall interferometers. It realizes the simplest-for-analysis Mach-Zehnder interference scheme, free from Coulomb blockade effects. By contrast to the standard Mach- Zehnder realization, our device does not contain an etched region inside the interference loop. For the first time for a Mach- Zehnder interference scheme, the device demonstrates interference oscillations with Phi* = e/e* Phi(0) = Phi(0)/nu periodicity at fractional filling factor 1/3. This result indicates that we observe a clear evidence for fractionally charged quasiparticles from simple Aharonov-Bohm interference. Copyright (c) EPLA, 2012