Dependence of superconducting temperature on chemical bond parameters in YBa2Cu3O6 + δ (δ = 0 − 1)

Lattice Energy Estimation for Inorganic Ionic Crystals

“…The definition of ionicity f i and covalency f c can be found in diverse literature both for binary crystals 12-16 and for complex crystals. − Therefore, only a brief discussion is given in this paper. Usually there are two ways to calculate f i and f c depending on the availability of dielectric constant or index of refraction.…”

“…(ii) Complex Ionic Crystals. From our previous study, it is known that complex crystals can be decomposed into the binary crystals. − On the basis of this idea, the total lattice energy U cal of a complex crystal can be written as …”

The relationship between the micro-mechanism and macroscopic dielectric properties in Ba 1−x Bi x Ti 1−x−y Zn 0.75x W 0.25x+y O 3+y systems

“…On the basis of generalized P-V-L theory (Dielectric theory of chemical bond), Zhang et al reported that the lattice energy(the average bond energy) can be obtained by the relative parameters of chemical bond [34][35][36]. The lattice energy U cal of a complex crystal can be expressed as formula (2)-(5):…”

New Negative Temperature Coefficient Ceramics in Ca–Ce–Nb–M–O (M=Mo or W) System

“…C omplex oxides have yielded numerous materials of interest to solid‐state chemists, condensed matter physicists, and materials scientists. They exhibit interesting transport properties such as superconductivity, 1 metallic conductivity, 2 semiconductivity, 3 magnetism, etc. Semiconducting oxides are a very important group of materials; their applications span through photocatalysts, 4 negative temperature coefficient (NTC) thermistors, 5 gas sensors, 6 etc.…”