Journal
PHYSICAL REVIEW B
Volume 81, Issue 16, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.81.161303
Keywords
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Funding
- Israeli Science Foundation (ISF)
- Minerva Foundation
- German Israeli Foundation (GIF)
- German Israeli Project Cooperation (DIP)
- European Community [FP7/20072013]
- ERC [227716]
- U.S. Israel Bi-National Science Foundation
- Korean government (MEST) [2009-006003]
- National Research Foundation of Korea [2008-0060031] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
- European Research Council (ERC) [227716] Funding Source: European Research Council (ERC)
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Charged excitations in the fractional quantum Hall effect are known to carry fractional charges, as theoretically predicted and experimentally verified. Here we report on the dependence of the tunneling quasiparticle charge, as determined via highly sensitive shot noise measurements, on the measurement conditions, in the odd denominators states nu = 1/3 and nu = 7/3, and in the even denominator state nu = 5/2. In particular, for very weak backscattering probability and sufficiently small excitation energies (temperature and applied voltage), tunneling charges across a constriction were found to be significantly higher than the theoretically predicted fundamental quasiparticle charges.
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