Combining mean-field and renormalization group analyses, here we unveil the nature of recently observed superconductivity parent metallic states in chemically doped rhombohedral trilayer graphene, subject to external electric displacement fields ($D$) [H. Zhou, \emph{et al.}, Nature (London) {\bf 598}, 434 (2021)]. We argue that close charge neutrality, on site Hubbard repulsion favors layer an...

The dielectric constant of a material is one of the fundamental features used to characterize its electrostatic properties such as capacitance, charge screening, and energy storage capability. Graphene is a material with unique behavior due to its gapless electronic structure and linear dispersion near the Fermi level, which can lead to a tunable band gap in bilayer and trilayer graphene, a sup...

A topological heavy-fermion (THF) model is formulated for magical-angle twisted symmetric trilayer graphene (MATSTG), where ``symmetric'' means that the top and bottom layers are rotated equally with respect to middle layer. In addition localized $f$ modes itinerant $c$ (which serve as basis of THF bilayer graphene), MATSTG consists extra Dirac ($d$) modes. The newly proposed $f\ensuremath{-}c\...

We studied Fano interference between the Raman spectrum of G-band phonons and electron continuum in a multilayer graphene stack. The thickness power dependencies coefficient ∣1/q∣ G-mode, where q is asymmetry parameter, were spatially visualized analyzed using Gaussian-convoluted Breit–Wigner–Fano function. estimated decreases with an increase layer number laser low-power region at least for mo...

The aim of this experimental work was to investigate the influence ion beam charge state on damage production in nanomaterials. To achieve this, we employed Raman spectroscopy, atomic force microscopy, and transmission electron microscopy nanomaterials irradiated by a 23 MeV I beam. We found significant monolayer graphene, but no evidence effect bilayer trilayer nor graphite. Furthermore, CaF2 ...