Dependence of the tunneling quasiparticle charge determined via shot noise measurements on the tunneling barrier and energetics
作者： M. Dolev , Y. Gross , Y. C. Chung , M. Heiblum , V. Umansky
DOI: 10.1103/PHYSREVB.81.161303
关键词:
摘要: Charged excitations in the fractional quantum Hall effect are known to carry charges, as theoretically predicted and experimentally verified. Here we report on dependence of tunneling quasiparticle charge, determined via highly sensitive shot noise measurements, measurement conditions, odd denominators states v=1/3 v=7/3 even denominator state v=5/2. In particular, for very weak backscattering probability sufficiently small excitation energies (temperature applied voltage), charges across a constriction were found be significantly higher than fundamental charges.
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