Detection of composite fermions by magnetic focusing
- 28 March 1994
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 72 (13), 2065-2068
- https://doi.org/10.1103/physrevlett.72.2065
Abstract
We report on transverse magnetic focusing experiments in two-dimensional electron systems in the vicinity of Landau level filling factor ν=1/2. We observe quasiperiodic magnetic focusing peaks for ν1/2 in several double-constriction GaAs heterojunction samples. The quasiperiod and the direction of focusing in all of these samples are in good quantitative agreement with that expected from semiclassical transport by composite fermions of charge -‖e‖.Keywords
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