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RETRACTED: Chiral Majorana fermion modes in a quantum anomalous Hall insulator-superconductor structure
Qing Lin He1, Lei Pan2, Alexander L Stern3
1Department of Electrical and Computer Engineering, Department of Physics, and Department of Materials Science and Engineering, University of California, Los Angeles, CA 90095, USA. qlhe@ucla.edu kouxf@shanghaitech.edu.cn sczhang@stanford.edu wang@ee.ucla.edu.
Abstract:
Majorana fermion is a hypothetical particle that is its own antiparticle. We report transport measurements that suggest the existence of one-dimensional chiral Majorana fermion modes in the hybrid system of a quantum anomalous Hall insulator thin film coupled with a superconductor. As the external magnetic field is swept, half-integer quantized conductance plateaus are observed at the locations of magnetization reversals, giving a distinct signature of the Majorana fermion modes. This transport signature is reproducible over many magnetic field sweeps and appears at different temperatures. This finding may open up an avenue to control Majorana fermions for implementing robust topological quantum computing.
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