Scale-Invariant Quantum Anomalous Hall Effect in Magnetic Topological Insulators beyond the Two-Dimensional Limit
University of California, Los Angeles · Institute of Physics, Academia Sinica · +1 more institution
Abstract
We investigate the quantum anomalous Hall effect (QAHE) and related chiral transport in the millimeter-size (Cr(0.12)Bi(0.26)Sb(0.62))₂Te₃ films. With high sample quality and robust magnetism at low temperatures, the quantized Hall conductance of e²/h is found to persist even when the film thickness is beyond the two-dimensional (2D) hybridization limit. Meanwhile, the Chern insulator-featured chiral edge conduction is manifested by the nonlocal transport measurements. In contrast to the 2D hybridized thin film, an additional weakly field-dependent longitudinal resistance is observed in the ten-quintuple-layer film, suggesting the influence of the film thickness on the dissipative edge channel in the QAHE…
Citation impact
- FWCI
- 33.79
- Percentile
- 100%
- References
- 50
Authors
15Topics & keywords
- Quantum anomalous Hall effect
- Topological insulator
- Condensed matter physics
- Quantum Hall effect
- Magnetic field
- Materials science
- Quantum
- Physics