In the hetero-site nucleation process, the increase of both H2and CH4flow rates are important for seeding and growth of the second layer graphene. The ratio of bilayer graphene domains to all graphene domains (RBLG) as a function of the ratio of H2flow rate in step II to that in step ...
The structural and electronic properties of twisted bilayer graphene (TBG) on SiC(000) grown by Si flux-assisted molecular beam epitaxy were investigated using scanning tunneling microscopy (STM) and angle-resolved photoelectron spectroscopy with nanometric spatial resolution. STM images revealed a wide ...
Selection rules and interference effects in angle resolved photoemission spectra from twisted graphene bilayers are studied within a long wavelength theory for the electronic structure. Using a generic model for the interlayer coupling, we identify features in the calculated ARPES momentum distributions ...
Near the magic angle, strong correlations drive many intriguing phases in twisted bilayer graphene (tBG) including unconventional superconductivity and chern insulation. Whether correlations can tune symmetry breaking phases in tBG at intermediate (greater than or similar to 2 degrees) twist angles remai...
Nodal Surfaces in Photoemission from Twisted Bilayer Graphenedoi:10.1103/PhysRevB.87.205444Selection rules and interference effects in angle-resolved photoemission spectra (ARPES) from twisted graphene bilayers are studied within a long-wavelength theory for the electronic structure. Using a generic model ...
nanoARPEStwisted bilayer graphenevan der Waals heterostructuresvan Hove singularitysIn article number 2001656, Jyoti Katoch, Sran Ulstrup, and co﹚orkers apply nanoscale angle‐resolved photoemission (nanoARPES) to measure the superlattice van Hove singularity formed by the Dirac cones of twisted bilayer...
nanoARPEStwisted bilayer grapheneVan der Waals heterostructureTo pinpoint the electronic and structural mechanisms that affect intrinsic and extrinsic performance limits of twoヾimensional material devices, it is of critical importance to resolve the electronic properties on the mesoscopic length scale of...
Here we report the experimental observation of field-tunable dichotomic electronic structure of tMBG by nanospot angle-resolved photoemission spectroscopy (NanoARPES) with operando gating. Interestingly, selective enhancement of the relative spectral weight contributions from monolayer and bilayer graphene is ...
Here, we combine different imaging techniques and angle-resolved photoemission with simultaneous real- and momentum-space resolution (nano-ARPES) to directly map the band dispersion in twisted bilayer graphene devices near charge neutrality. Our experiments reveal large areas with a homogeneous twist ...
Gaps induced by inversion symmetry breaking and second-generation dirac cones in graphene/hexagonal boron nitride. Nat. Phys. 12, 1111–1115 (2016). Article Google Scholar Razado-Colambo, I. et al. Nanoarpes of twisted bilayer graphene on sic: Absence of velocity renormalization for small ...