Publication

Influence of chemical substitutions on the charge instability of BaVS3

László Forró, Helmuth Berger, Ana Akrap
2008
Conference Papers

Abstract

We study the influence of Sr substitutions on the structural counterpart of the MI transition of BaVS3. When Sr content increases, the commensurate CDW modulation of pure BaVS3 is changed into an incommensurate short range modulation that we attribute to a charge ordering of the e(t(2g)) electrons. The same features are observed in S deficient samples. (C) 2007 Elsevier B.V. All rights reserved.

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https://infoscience.epfl.ch/entities/publication/686cf4eb-cee0-49fb-bc18-1cef8279592c

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László Forró, Helmuth Berger, Ana Akrap
2008
Conference Papers

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/686cf4eb-cee0-49fb-bc18-1cef8279592c

About this result

Related concepts (5)

Substitution reaction

A substitution reaction (also known as single displacement reaction or single substitution reaction) is a chemical reaction during which one functional group in a chemical compound is replaced by another functional group. Substitution reactions are of prime importance in organic chemistry. Substitution reactions in organic chemistry are classified either as electrophilic or nucleophilic depending upon the reagent involved, whether a reactive intermediate involved in the reaction is a carbocation, a carbanion or a free radical, and whether the substrate is aliphatic or aromatic.

Chemical reaction

A chemical reaction is a process that leads to the chemical transformation of one set of chemical substances to another. Classically, chemical reactions encompass changes that only involve the positions of electrons in the forming and breaking of chemical bonds between atoms, with no change to the nuclei (no change to the elements present), and can often be described by a chemical equation. Nuclear chemistry is a sub-discipline of chemistry that involves the chemical reactions of unstable and radioactive elements where both electronic and nuclear changes can occur.

Nucleophilic substitution

In chemistry, a nucleophilic substitution is a class of chemical reactions in which an electron-rich chemical species (known as a nucleophile) replaces a functional group within another electron-deficient molecule (known as the electrophile). The molecule that contains the electrophile and the leaving functional group is called the substrate.R. A. Rossi, R. H. de Rossi, Aromatic Substitution by the SRN1 Mechanism, ACS Monograph Series No. 178, American Chemical Society, 1983. .

Related publications (1)

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2009