Hyperbolic enhancement of photocurrent patterns in minimally twisted bilayer graphene
arXiv:2011.05179 · doi:10.1038/s41467-021-21792-2
Abstract
Quasi-periodic moiré patterns and their effect on electronic properties of twisted bilayer graphene (TBG) have been intensely studied. At small twist angle , due to atomic reconstruction, the moiré superlattice morphs into a network of narrow domain walls separating micron-scale AB and BA stacking regions. We use scanning probe photocurrent imaging to resolve nanoscale variations of the Seebeck coefficient occurring at these domain walls. The observed features become enhanced in a range of mid-infrared frequencies where the hexagonal boron nitride (hBN), which we use as a TBG substrate, is optically hyperbolic. Our results illustrate new capabilities of nano-photocurrent technique for probing nanoscale electronic inhomogeneities in two-dimensional materials.
References in corpus (28)
- Universal Dynamic Conductivity and Quantized Visible Opacity of Suspended Graphene
- Magic-angle graphene superlattices: a new platform for unconventional superconductivity
- Correlated Insulator Behaviour at Half-Filling in Magic Angle Graphene Superlattices
- Emergent ferromagnetism near three-quarters filling in twisted bilayer graphene
- Intrinsic quantized anomalous Hall effect in a moiré heterostructure
- The electronic properties of bilayer graphene
- Hot Carrier-Assisted Intrinsic Photoresponse in Graphene
- Sub-diffractional, volume-confined polaritons in a natural hyperbolic material: hexagonal boron nitride
- Magic Angle Spectroscopy
- Thermoelectric and Magnetothermoelectric Transport Measurements of Graphene
- Imaging Electronic Correlations in Twisted Bilayer Graphene near the Magic Angle
- Charge-Order and Broken Rotational Symmetry in Magic Angle Twisted Bilayer Graphene
- Spectroscopic signatures of many-body correlations in magic angle twisted bilayer graphene
- Photo-Thermoelectric Effect at a Graphene Interface Junction
- Hyperbolic phonon-polaritons in boron nitride for near-field optical imaging
- Strain Solitons and Topological Defects in Bilayer Graphene
- Subdiffractional focusing and guiding of polaritonic rays in a natural hyperbolic material
- Hot Carrier Transport and Photocurrent Response in Graphene
- Strongly Correlated Chern Insulators in Magic-Angle Twisted Bilayer Graphene
- Photonic crystals for nano-light in moiré graphene superlattices
- Near-field photocurrent nanoscopy on bare and encapsulated graphene
- Shockley-Ramo theorem and long-range photocurrent response in gapless materials
- Tunneling Plasmonics in Bilayer Graphene
- Plasmon reflections by topological electronic boundaries in bilayer graphene
- Nano-imaging photoresponse in a moiré unit cell
- Nano-photocurrent mapping of local electronic structure in twisted bilayer graphene
- Photo-Nernst current in graphene
- Electrical detection of hyperbolic phonon-polaritons in heterostructures of graphene and boron nitride
Cited by in corpus (17)
- Photocurrent as a multi-physics diagnostic of quantum materials
- Multiple and spectrally robust photonic magic angles in reconfigurable α-MoO3 trilayers
- Roadmap for Photonics with 2D Materials
- A perspective of twisted photonic structures
- Nano-imaging photoresponse in a moiré unit cell
- Perspective: Phonon polaritons for infrared optoelectronics
- Visualizing moiré ferroelectricity via plasmons and nano-photocurrent in graphene/twisted-WSe2 structures
- Charge density wave and finite-temperature transport in minimally twisted bilayer graphene
- Theory of plasmonic edge states in chiral bilayer systems
- Nonlinear intensity dependence of photogalvanics and photoconductance induced by terahertz laser radiation in twisted bilayer graphene close to magic angle
- Mapping the intrinsic photocurrent streamlines through micromagnetic heterostructure devices
- Nonlinear optical responses and quantum geometry in rhombohedral trilayer graphene
- Infrared photoresistance as a sensitive probe of electronic transport in twisted bilayer graphene
- Intrinsic and extrinsic photogalvanic effects in twisted bilayer graphene
- Gradient polaritonic surface with space-variant switchable light-matter interactions in 2D moire superlattices
- Electrically driven plasmon-polaritonic bistability in Dirac electron tunneling transistors
- Local optical conductivity of strain solitons in bilayer graphene with arbitrary soliton angle