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.
A sub-2 Kelvin cryogenic magneto-terahertz scattering-type scanning near-field optical microscope (cm-THz-sSNOM)
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Terahertz near-field microscopy on encapsulated graphene reveals magnetic-field-tunable cyclotron resonance of Dirac fermions at low temperature.
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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.
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Terahertz magneto-nanoscopy of encapsulated monolayer graphene
Terahertz near-field microscopy on encapsulated graphene reveals magnetic-field-tunable cyclotron resonance of Dirac fermions at low temperature.