Chiral transport along magnetic domain walls in the quantum anomalous Hall effect

Chiral transport along magnetic domain walls in the quantum anomalous Hall effect The quantum anomalous Hall effect in thin film magnetic topological insulators (MTIs) is characterized by chiral, one-dimensional conduction along the film edges when the sample is uniformly magnetized. This has been experimentally confirmed by measurements of quantized Hall resistance and near-vanishing longitudinal resistivity in magnetically doped (Bi,Sb)2Te3. Similar chiral conduction is expected along magnetic domain walls, but clear detection of these modes in MTIs has proven challenging. Here, we intentionally create a magnetic domain wall in an MTI, and study electrical transport along the domain wall. In agreement with theoretical predictions, we observe chiral transport along a domain wall. We present further evidence that two modes equilibrate while co-propagating along the length of the domain wall. npj Quantum Materials Springer Journals

Chiral transport along magnetic domain walls in the quantum anomalous Hall effect

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Nature Publishing Group UK
Copyright © 2017 by The Author(s)
Physics; Physics, general; Condensed Matter Physics; Structural Materials; Surfaces and Interfaces, Thin Films; Quantum Physics
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