The transition metal pnictide CrAs exhibits superconductivity in the vicinity of a helimagnetic phase, where it has been found that propagation vector is parallel to c axis and magnetic moments lie ab plane. Here we use initio calculations study interactions material. Mapping onto Heisenberg Hamiltonian, calculate exchanges by using LDA+U unveil origin frustration. Finally, reproduce double hel...

The discovery of pressure-induced superconductivity in helimagnets (CrAs, MnP) has attracted considerable interest understanding the relationship between complex magnetism and unconventional superconductivity. However, nature magnetic interactions that drive unusual double-helical order these materials remains unclear. Here, we report neutron scattering measurements excitations CrAs single crys...

Abstract Biological wastewater treatment is linked to direct and indirect greenhouse gases (GHGs) emissions, thus new approaches on design operation of plants (WWTPs) must be adopted aiming towards GHGs emissions’ mitigation. This study evaluates the impact solids retention time (SRT) (CO 2 N O) emissions activated sludge (AS) processes with nutrients removal operating at 10, 30 180 days SRT. T...

We report first-principles calculations of zinc-blende half-metals, identifying systems for epitaxial growth with semiconductors, and present calculations for CrAs/GaAs multilayers. We find that half-metallicity is conserved troughout the heterostructure, making this a good candidate for spintronics applications.

:Creditworthiness is acknowledged worldwide as focal point of debt processing. Credit Rate, an output credit-rating process, reflects such creditworthiness. We reviewed literature on elements credit rating, viz. agencies (CRAs) and model. Rating independent evaluation CRAs perform this to support financial institutions in processing debts. Literature added domain from January 2001 November 2020...