Resonant Tunneling in the Quantum Hall Regime: Measurement of Fractional Charge
Abstract
In experiments on resonant tunneling through a "quantum antidot" (a potential hill) in the quantum Hall (QH) regime, periodic conductance peaks were observed as a function of both magnetic field and back gate voltage. A combination of the two periods constitutes a measurement of the charge of the tunneling particles and implies that charge deficiency on the antidot is quantized in units of the charge of quasi-particles of the surrounding QH condensate. The experimentally determined value of the electron charge e is 1.57 × 10–19 coulomb = (0.98 ± 0.03)e for the states ν = 1 and ν = 2 of the integer QH effect, and the quasi-particle charge is 5.20 × 10–20 coulomb = (0.325 ± 0.01)e for the state ν = 1/3 of the fractional QH effect.
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Published In
Science
Volume 267 | Issue 5200
17 February 1995
17 February 1995
Copyright
1995 by the American Association for the Advancement of Science.
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Received: 7 October 1994
Accepted: 6 December 1994
Published in print: 17 February 1995
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- Quasi-Particle Properties from Tunneling in the v = 5/2 Fractional Quantum Hall State, Science, 320, 5878, (899-902), (2021)./doi/10.1126/science.1157560
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