Intercalate Superconductivity and van der Waals Equation.

ABSTRACT: Superconductivity in two single-element intercalated compounds has been investigated with the van der Waals equation. For Cu _x TiSe₂ and YBa₂Cu₃O_6+x , the van der Waals term characterizing the attractive energy per particle (i.e., electrons), aN/V, is calculated from concentration-dependent transition temperature plots derived from experiment. It is shown that two times the attractive energy per intercalant valence electron (2aN _val/V _unit) is equal to the energy gap predicted by BCS theory (Δ) for these superconductors. This realization allows another way to estimate the energy gap of superconducting intercalated insulators and semiconductors, this time, directly from phy

SUBMITTER: Benjamin SM 

PROVIDER: S-EPMC9341279 | biostudies-literature | 2022 Jul

REPOSITORIES: biostudies-literature