Publication Date:
2018-06-12
Description:
Author(s): Szymon Hennel, Patrick Scheidegger, Max Kellermeier, Andrea Hofmann, Tobias Krähenmann, Christian Reichl, Werner Wegscheider, Thomas Ihn, and Klaus Ensslin Tunneling between two close-by edge states is a potentially powerful probe of topological order in the fractional quantum Hall effect. A fit to experimental data is believed to yield the effective charge and the interaction parameter of current-carrying quasiparticles. However, the robustness of this method has yet to be established. Here, the authors consider the well-understood state at ν = 1 / 3 and check whether quasiparticle tunneling measures the expected parameters. While a charge of e / 3 is observed, the interaction parameter is not universal, and the currently available theory cannot describe data obtained for high channel transmission. At ν = 4 / 3 , the data suggest that only an inner Laughlin edge mode contributes to tunneling. [Phys. Rev. B 97, 245305] Published Mon Jun 11, 2018
Keywords:
Semiconductors II: surfaces, interfaces, microstructures, and related topics
Print ISSN:
1098-0121
Electronic ISSN:
1095-3795
Topics:
Physics
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