Modern Valence-Bond Description of Homoaromaticity

Bosonic Resonating-Valence-Bond Description of a Doped Antiferromagnet

We propose a theory for a doped antiferromagnet based on the bosonic resonating-valence-bond (RVB) description incorporating the phase string effect. Both antiferromagnetic and superconducting phase transitions occur naturally inside such a bosonic RVB phase. Two distinct metallic regions— underdoping and optimum doping—are also found to be a logical consequence; their unique features explain t...

Heisenberg Antiferromagnet on Square-Kagomé Lattice: Resonating Valence Bond Description

Brønsted acidity of protic ionic liquids: a modern ab initio valence bond theory perspective.

Room temperature ionic liquids (ILs), especially protic ionic liquids (PILs), are used in many areas of the chemical sciences. Ionicity, the extent of proton transfer, is a key parameter which determines many physicochemical properties and in turn the suitability of PILs for various applications. The spectrum of computational chemistry techniques applied to investigate ionic liquids includes cl...

Generalized Valence Bond Description of the Low-Lying States of NiCO'

GVB and GVB-CI wave functions (using a double {basis) have been obtained as a function of internuclear distance for the lowest three states of NiCO. The wave functions lead to a qualitative description in which the Ni atom is neutral with a ( 4 ~ ) ' ( 3 d ) ~ atomic configuration. The C O lone pair delocalizes slightly onto the Ni leading to the 4s-like orbital hybridizing away from the CO. Th...

The Valence Bond Glass phase

We show that a new glassy phase can emerge in presence of strong magnetic frustration and quantum fluctuations. It is a Valence Bond Glass. We study its properties solving the Hubbard-Heisenberg model on a Bethe lattice within the large N limit introduced by Affleck and Marston. We work out the phase diagram that contains Fermi liquid, dimer and valence bond glass phases. This new glassy phase ...