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Abstract: Alkaline earth mono-silicides {\AE}Si, {\AE} $=$ Ca, Sr, Ba are poor metalsand their transport properties are not solely determined by the Zintl anion, incontrast to their Zintl-type composition. Their conducting network is formed bythe depopulated ${}^{1} {\infty}$Si$^{2-}$ $\pi$-system and {\AE}-$d$ states.This justifies the special local coordination of the metal atoms and theplanarity of the silicon chains. The low density of carriers seems to be aplayground for magnetic instabilities and the triangular prismatic arrangementof {\AE} atoms responsible for the observed weak glassy behavior.



Author: Eduardo Cuervo-Reyes, Elizabeth Diane Stalder, Christian Mensing, Serhiy Budnyk, Reinhard Nesper

Source: https://arxiv.org/



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