Related Experiment Video
Updated: Mar 29, 2026

Probe Type II Band Alignment in One-Dimensional Van Der Waals Heterostructures Using First-Principles Calculations
Published on: October 12, 2019
Spin-Unrestricted Calculations of Bare-Edged Nanographenes Using DFT and Many-Body Perturbation Theory
Rodolphe Pollet1, Hakim Amara1
1DSM/IRAMIS/SPAM-LFP, CEA, Gif-sur-Yvette, France, and Laboratoire d'Etude des Microstructures, ONERA-CNRS, Châtillon, France.
Abstract:
The ability of Density Functional Theory to predict the electronic and magnetic properties of semi-infinite graphene with a single bare edge has been probed. In order to improve the accuracy of spin-unrestricted calculations performed with semilocal density functionals, higher-level methods including double hybrid density functionals and many-body perturbation theory have been applied to the polycyclic aromatic hydrocarbons model systems. We show that the antiferromagnetic or ferromagnetic tendencies of the corresponding electronic ground states strongly depend on the choice of the density functional. In addition the relative stability of the armchair and zigzag edges has been investigated, emphasizing the importance of using methods beyond semilocals density functionals.
More Related Videos
11:42Fabrication of Gate-tunable Graphene Devices for Scanning Tunneling Microscopy Studies with Coulomb Impurities
Published on: July 24, 2015
08:18Microscopic Visualization of Porous Nanographenes Synthesized through a Combination of Solution and On-Surface Chemistry
Published on: March 4, 2021
Related Concept Videos
Spin–Spin Coupling: One-Bond Coupling
Spin–Spin Coupling Constant: Overview
Qualitatively, any spin plus-half nucleus polarizes the spins of its electrons to the minus-half state. Consequently, the paired electron in the hydrogen–carbon bond must...
Valence Bond Theory
Debye–Huckel–Onsager Conductance Equation
Spin–Spin Coupling: Two-Bond Coupling (Geminal Coupling)
The central atom need not be NMR-active because its electrons are affected by the electron polarization of the spin-active atoms. However, spin information is transmitted less effectively than in one-bond coupling, and 2J values are usually weaker than 1J values. The energy of...
¹H NMR: Interpreting Distorted and Overlapping Signals
As Δν decreases and the signals move closer, the doublets appear increasingly distorted. The intensities of the inner lines increase at the cost of those of the outer lines as the signals are...