2000/12/31 by Yasushi Ishii, Takeo Fujiwara · 2 citations
Earth and Planetary Sciences · Materials Science · Physics and Astronomy · #Mineralogy and Gemology Studies #Quasicrystal Structures and Properties #X-ray Diffraction in Crystallography #cond-mat.mtrl-sci
paper · pdf · doi:10.1103/physrevlett.87.206408
published as Phys. Rev. Lett. 87, 206408 (2001) · 4 pages, 2 figures
arxiv created 2001/08/06 · openalex publication_date 2001/10/30 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
The cohesion mechanism of cubic approximant crystals in newly discovered binary quasicrystals, Cd(6)M ( M = Yb or Ca), is studied theoretically. It is found that stabilization due to alloying is obtained if M is an element with low-lying unoccupied d states. This leads to the conclusion that the cohesion of Cd-based compounds is due to hybridization of the d states of Yb and Ca with a wide sp band. The Hume-Rothery mechanism does not play a principal role in the stability because neither a distinct pseudogap nor stabilization due to alloying is obtained for isostructural Cd-Mg. In addition to the electronic origin, matching of the atomic size is very crucial for quasicrystal formation in Cd-based compounds.