Magnetic fields induce near-field conductivity at step edges in topological materials, enabling nanoscale imaging of spin-polarized helical edge modes whose infrared response scales linearly with atomic layer thickness.
npj Quantum Materials5(1), 80 (2020)
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Magnetic Brightening and Nanoscale Imaging of Spin-Polarized Helical Edge Modes
Magnetic fields induce near-field conductivity at step edges in topological materials, enabling nanoscale imaging of spin-polarized helical edge modes whose infrared response scales linearly with atomic layer thickness.