Structure and Bonding in Cubic IV-VI Crystals VII. On the Influence of Defects on the Stability of the Cubic Structure
作者： P. Enders
关键词: Phase transition 、 Ionic bonding 、 Diatomic molecule 、 Chemistry 、 Electronic charge density 、 Condensed matter physics 、 Electronic, Optical and Magnetic Materials
摘要: The influence of defects (vacancies) on the phase transition is qualitatively treated within framework simple one-dimensional models. Generalizing Gomez-Santos' and Yndurain's treatment to a diatomic chain, their stabilizing cubic role can be explained as destroying coherence electronic charge density wave driving Peierls instability. degree necessary suppress quite small due extrinsic gap (ionic energy). Der Einflus von Defekten (Vakanzen) auf den Phasenubergang wird im Rahmen einfacher ein-dimensionaler Modelle behandelt. In Verallgemeinerung Gomes-Santos' und Yndurains Rechnung eine zweiatomare Kette kann ihre die kubische Phase stabilisierende Rolle als Zerstorung der Koharenz Peierls-Instabilitat treibenden elektronischen Ladungsdichte-welle erklart werden. Der fur Unterdruckung des Phasenuberganges notwendige Grad Koharenzzerstorung ziemlich klein sein dank extrinsischen Peierls-Gaps (der ionischen Energie).
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