منابع مشابه
Molecular doping and band-gap opening of bilayer graphene.
The ability to induce an energy band gap in bilayer graphene is an important development in graphene science and opens up potential applications in electronics and photonics. Here we report the emergence of permanent electronic and optical band gaps in bilayer graphene upon adsorption of π electron containing molecules. Adsorption of n- or p-type dopant molecules on one layer results in an asym...
متن کاملBand gap opening by two-dimensional manifestation of peierls instability in graphene.
Using first-principles calculations of graphene having high-symmetry distortion or defects, we investigate band gap opening by chiral symmetry breaking, or intervalley mixing, in graphene and show an intuitive picture of understanding the gap opening in terms of local bonding and antibonding hybridizations. We identify that the gap opening by chiral symmetry breaking in honeycomb lattices is an...
متن کاملMagnetic Band Gap Opening in Long Sequences of Rhombohedral-stacked Multilayer Graphene
Attempts to induce a clean and stabilized gap in the excitation spectrum of graphene, 1–3 or a robust magnetism 4–6 preserving a high carrier mobility have not been successful yet. An alternative procedure to achieve an optical gap and a magnetic state in graphene is to explore correlated states in flat electronic bands hosted by multilayer graphene with rhombohedral stacking 7–9 . The low kine...
متن کاملLarge band gap opening between graphene Dirac cones induced by Na adsorption onto an Ir superlattice.
We investigate the effects of Na adsorption on the electronic structure of bare and Ir cluster superlattice-covered epitaxial graphene on Ir(111) using angle-resolved photoemission spectroscopy and scanning tunneling microscopy. At Na saturation coverage, a massive charge migration from sodium atoms to graphene raises the graphene Fermi level by ~1.4 eV relative to its neutrality point. We find...
متن کاملElectronic Structures, Bonding Configurations, and Band-Gap-Opening Properties of Graphene Binding with Low-Concentration Fluorine
To better understand the effects of low-level fluorine in graphene-based sensors, first-principles density functional theory (DFT) with van der Waals dispersion interactions has been employed to investigate the structure and impact of fluorine defects on the electrical properties of single-layer graphene films. The results show that both graphite-2 H and graphene have zero band gaps. When fluor...
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ژورنال
عنوان ژورنال: Universal Journal of Physics and Application
سال: 2016
ISSN: 2331-6535,2331-6543
DOI: 10.13189/ujpa.2016.100104