Terahertz magneto-nanoscopy of encapsulated monolayer graphene
arXiv:2604.22940 · doi:10.1063/5.0310548
Abstract
This study investigates the nanoscale conductivity of encapsulated monolayer graphene at temperatures down to 5 K and magnetic fields of up to 1 T. We use the scattering-type scanning near-field optical microscopy (s-SNOM) technique to probe magnetic-field-dependent responses from graphene close to charge neutrality in the terahertz spectral region. We observe the near-perfect high- reflector behavior of graphene but with subtle changes by the presence of magnetic fields. Measurements align with calculations of the magneto-optical conductivity and the near-field spectroscopic contrast that describes the field-tunable cyclotron resonance of Dirac fermions. Our result provides an initial step toward understanding temperature and magnetic-field effects on nanoscale terahertz transport in two-dimensional quantum materials.
References in corpus (12)
- Magic-angle graphene superlattices: a new platform for unconventional superconductivity
- Graphene plasmonics: A platform for strong light-matter interaction
- Gate-tuning of graphene plasmons revealed by infrared nano-imaging
- Optical nano-imaging of gate-tuneable graphene plasmons
- Magneto-optical conductivity in Graphene
- Cleaning Interfaces in Layered Materials Heterostructures
- Photonic crystals for nano-light in moiré graphene superlattices
- Transfer matrix method for optics in graphene layers
- Tuning quantum non-local effects in graphene plasmonics
- Collective excitations in twisted bilayer graphene close to the magic angle
- Experimental observation of ABCB stacked tetralayer graphene
- Cryogenic Magneto-Terahertz Scanning Near-field Optical Microscope (cm-SNOM)