Related Experiment Video
Updated: Mar 21, 2026

Probe Type II Band Alignment in One-Dimensional Van Der Waals Heterostructures Using First-Principles Calculations
Published on: October 12, 2019
New range-separated screened and full-range hybrid functionals
Sankha Ghosh1, Amr Oshi1, Dennis R Salahub1
1Department of Chemistry, Department of Physics and Astronomy, CMS-Center for Molecular Simulation, IQST-Institute for Quantum Science and Technology, Quantum Alberta, University of Calgary, 2500 University Drive NW, Calgary, Alberta T2N 1N4, Canada.
None:
We develop and assess new full-range and range-separated (RS) hybrid density functionals combining G96 or WC exchange with Perdew-Burke-Ernzerhof (PBE) and Lee-Yang-Parr correlations. The B1-type full hybrids, generalized through a Puiseux-series expansion of the adiabatic connection, were benchmarked against the Ghosh-Oshi-Salahub-0 database spanning main-group and transition-metal thermochemistry. Among full hybrids, only PBE0 improves upon its parent generalized gradient approximation, while others overcorrect. RS hybrids achieve balanced and transferable accuracy; GSG2 (MAE ≈ 5.97 kcal mol-1) slightly outperforms GS2 and HSE06. These results underscore that range separation is essential for broad applicability, establishing the Ghosh-Salahub-Gill and Ghosh-Salahub families as versatile screened hybrid functionals with promising utility in both molecular and condensed-phase systems.
More Related Videos
Related Concept Videos
Hybridization of Atomic Orbitals I
Hybridization of Atomic Orbitals II
Valence Bond Theory and Hybridized Orbitals
A σ bond (single bond in a Lewis structure) is a covalent bond in which the electron density is...
¹H NMR: Complex Splitting
Splitting diagrams or splitting tree diagrams are routinely used to depict such complex couplings. While drawing splitting diagrams, the splitting with the larger coupling constant is usually applied...
¹H NMR: Long-Range Coupling
In alkenes, spin information is communicated via σ–π overlap, as seen in allylic (four-bond) and homoallylic (five-bond) couplings. These coupling interactions are stronger when the σ bond is parallel to the alkene...
Resonance and Hybrid Structures
Resonance Structures and Resonance Hybrids
The Lewis structure of a nitrite anion (NO2−) may actually be drawn in two different ways, distinguished by the locations of the N–O and N=O bonds.

