Superconductivity in a Scandium Borocarbide with a Layered Crystal Structure
arXiv:1910.13711 · doi:10.1021/acs.inorgchem.9b02709
Abstract
The discovery of nearly room-temperature superconductivity in superhydrides has motivated further materials research for conventional superconductors. To realize the moderately high critical temperature in materials containing light elements, we explored new superconducting phases in a scandium borocarbide system. Here, we report the observation of superconductivity in a new ternary Sc-B-C compound. The crystal structure, which was determined through a Rietveld analysis, belongs to tetragonal space group . By complementarily using the density functional theory calculations, a chemical formula of the compound was found to be expressed as ScCBC(). Interestingly, a small amount of B is essential to stabilize the present structure. Our experiments revealed the typical type-II superconductivity at . Additionally, we calculated the density of states within a first-principles approach and found that the contribution of the Sc-3d orbital was mainly responsible for the superconductivity.
arXiv comment13 pages, 3 tables, 8 figures
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