Oxygen-vacancy-induced magnetism in anti-perovskite topological Dirac semimetal BaSnO.

The thermodynamic, structural, magnetic and electronic properties of the pristine and intrinsic vacancy-defect-containing topological Dirac semimetal BaSnO are studied using first-principles density functional theory calculations. The thermodynamic stability of BaSnO has been evaluated with reference to its competing binary phases BaSn, BaSn and BaO. Subsequently, valid limits of the atomic chemical potentials derived from the thermodynamic stability were used for assessing the formation of Ba, Sn and O vacancy defects in BaSnO under different synthesis environments.

Pb ions mobility perturbation by iron particles during electrokinetic remediation of contaminated soil.

Electrokinetic (EK) remediation is one of the most useful approaches for de-contamination of soils. However, it is unclear that how and when the electrokinetic remediation gives advantages over other remediation techniques in soil. This study was designed to find the influence of Fe particles on the mobility of Pb ions, during electrokinetic remediation, in soil contaminated purposely by lead nitrate Pb(NO).