Local Atomic Arrangements and Band Structure of Boron Carbide.

Author(s) Rasim, K.; Ramlau, R.; Leithe-Jasper, A.; Mori, T.; Burkhardt, U.; Borrmann, H.; Schnelle, W.; Carbogno, C.; Scheffler, M.; Grin, Y.
Journal Angew Chem Int Ed Engl
Date Published 2018 May 22
Abstract

Boron carbide, the simple chemical combination of boron and carbon, is one of the best-known binary ceramic materials. Despite that, a coherent description of its crystal structure and physical properties resembles one of the most challenging problems in materials science. By combining ab initio computational studies, precise crystal structure determination from diffraction experiments, and state-of-the-art high-resolution transmission electron microscopy imaging, this concerted investigation reveals hitherto unknown local structure modifications together with the known structural alterations. The mixture of different local atomic arrangements within the real crystal structure reduces the electron deficiency of the pristine structure CBC+B , answering the question about electron precise character of boron carbide and introducing new electronic states within the band gap, which allow a better understanding of physical properties.

DOI 10.1002/anie.201800804
ISSN 1521-3773
Citation Rasim K, Ramlau R, Leithe-Jasper A, Mori T, Burkhardt U, Borrmann H, et al. Local Atomic Arrangements and Band Structure of Boron Carbide. Angew Chem Int Ed Engl. 2018;57(21):6130-6135.

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