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Diffuse X-ray scattering studies of molecular conductors

Diffuse X-ray scattering studies of molecular conductors REVIEW www.rsc.org/annrepc | Annual Reports C Diffuse X-ray scattering studies of molecular conductorsw Sylvain Ravy DOI: 10.1039/b605649k 1. Introduction Because small deviations to perfect periodicity can have a large influence on physical properties of crystals, structural techniques providing information on disorder have been widely used. Amongst the techniques giving access to such small structural changes, X-ray diffuse scattering has an important place. Indeed, while X-ray diffraction allows one to obtain the average structure of materials, i.e. the position of the atoms in the unit cell, valuable information on tiny modifications of these positions can be obtained through the study of out-of-Bragg scattering. In the field of molecular conductors, diffuse scattering studies have played a major role. Indeed, since the first diffuse scattering studies performed on TTF-TCNQ,1,2 which provided evidence for the so-called Peierls instability, many original structural phase transitions have been observed in molecular conductors, which are mainly due to their one-dimensional (1D) character. This review is devoted to the study of molecular conductors by diffuse scattering methods. In the first chapter, the basic of diffraction will be recalled, special attention being paid to the phenomena giving rise to small additional scattering features: the displacement and the substitution http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Annual Reports Section "C" (Physical Chemistry) Royal Society of Chemistry

Diffuse X-ray scattering studies of molecular conductors

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Publisher
Royal Society of Chemistry
Copyright
This journal is © The Royal Society of Chemistry
ISSN
0260-1826
eISSN
1460-4787
DOI
10.1039/b605649k
Publisher site
See Article on Publisher Site

Abstract

REVIEW www.rsc.org/annrepc | Annual Reports C Diffuse X-ray scattering studies of molecular conductorsw Sylvain Ravy DOI: 10.1039/b605649k 1. Introduction Because small deviations to perfect periodicity can have a large influence on physical properties of crystals, structural techniques providing information on disorder have been widely used. Amongst the techniques giving access to such small structural changes, X-ray diffuse scattering has an important place. Indeed, while X-ray diffraction allows one to obtain the average structure of materials, i.e. the position of the atoms in the unit cell, valuable information on tiny modifications of these positions can be obtained through the study of out-of-Bragg scattering. In the field of molecular conductors, diffuse scattering studies have played a major role. Indeed, since the first diffuse scattering studies performed on TTF-TCNQ,1,2 which provided evidence for the so-called Peierls instability, many original structural phase transitions have been observed in molecular conductors, which are mainly due to their one-dimensional (1D) character. This review is devoted to the study of molecular conductors by diffuse scattering methods. In the first chapter, the basic of diffraction will be recalled, special attention being paid to the phenomena giving rise to small additional scattering features: the displacement and the substitution

Journal

Annual Reports Section "C" (Physical Chemistry)Royal Society of Chemistry

Published: May 25, 2007

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