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arxiv: cond-mat/0209458 · v1 · pith:4EN7DSWSnew · submitted 2002-09-19 · ❄️ cond-mat.mtrl-sci · cond-mat.dis-nn

Indirect Mn-Mn pair interaction induces pseudogap in density of states of Al(Si)-Mn approximants

classification ❄️ cond-mat.mtrl-sci cond-mat.dis-nn
keywords interactionindirectmn-mnstatesdensitypseudogaprelatedal12mn
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The effect on the electronic structure of an indirect Mn-Mn interaction mediated by the valence states and the sp-d hybridisation is presented. In Al(rich)-Mn phases related to quasicrystals (Al12Mn, o-Al6Mn, alpha-Al9Mn2Si), this indirect interaction creates a Hume-Rothery pseudogap in the density of states together with a minimisation of the band energy. It is shown that Mn-Mn interaction up to distances around 1.0-2.0 nm plays an essential role in stabilizing related quasicrystal structures.

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