![]() Based on the transition temperature measured in TBLG experiments, we estimate the topological contribution of the superfluid weight in TBLG. The superfluid weight is crucial in determining the Berezinskii-Kosterlitz-Thouless transition temperature of the superconductor. In contrast, trivial flat bands have a zero superfluid weight. The data presented in this Letter show that the graphene energy-momentum dispersion remains linear at low energy in the presence of electron interactions, while the Dirac cone angle, which is inversely proportional to the velocity, decreases (gets squeezed) at low density. We provide numerical estimates of the effect that can guide experimental work to clearly discriminate between competing models for the low-energy band = T$$ Wilson loop winding number of TBLG flat bands, which renders that the superfluid weight is also bounded by this topological index. This study reports the enhancement of the physical adsorption of some insoluble lead compounds, from drinking water, onto polylactic acid (PLA) polymer and graphene oxide (GO) by filling with molybdenum disulfide (MoS2) nanoparticles (NPs). (a) Schematic of the Dirac cone variation as a function of density. Additionally, we find that this can be accomplished by a careful analysis of the electron density produced by backscattering of Bloch waves from an impurity potential localized on the moiré superlattice scale. Here we show that this choice has a profound consequence in a low-energy experimentally observable signature that therefore can be used to tightly constrain the analytic form of the appropriate low-energy theory. This inevitably introduces nontrivial geometrical constraints that arise from the assumed form of the projection. When these gaps are sufficiently large, one can study a band-projected Hamiltonian that correctly represents the dynamics within the minibands. The electronic bands of twisted bilayer graphene (TBLG) with a large-period moiré superlattice fracture to form narrow Bloch minibands that are spectrally isolated by forbidden energy gaps from remote dispersive bands.
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