Electrical magnetochiral anisotropy in a bulk chiral molecular conductor

So far, no effect of chirality on the electrical properties of bulk chiral conductors has been observed. Introduction of chiral information in tetrathiafulvalene precursors represents a powerful strategy towards the preparation of crystalline materials in which the combination of chirality and condu...

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Bibliographic Details
Published in:Nature communications 2014-05, Vol.5 (1), p.3757-3757, Article 3757
Main Authors: Pop, Flavia, Auban-Senzier, Pascale, Canadell, Enric, Rikken, Geert L. J. A., Avarvari, Narcis
Format: Article
Language:English
Subjects:
119/118
639/301/119/995
639/301/119/997
Condensed Matter
Humanities and Social Sciences
multidisciplinary
Physics
Science
Science (multidisciplinary)
Superconductivity
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Summary:So far, no effect of chirality on the electrical properties of bulk chiral conductors has been observed. Introduction of chiral information in tetrathiafulvalene precursors represents a powerful strategy towards the preparation of crystalline materials in which the combination of chirality and conducting properties might allow the observation of the electrical magnetochiral anisotropy effect. Here we report the synthesis by electrocrystallization of both enantiomers of a bulk chiral organic conductor based on an enantiopure tetrathiafulvalene derivative. The enantiomeric salts crystallize in enantiomorphic hexagonal space groups. Single crystal resistivity measurements show metallic behaviour for the enantiopure salts down to 40 K, in agreement with band structure calculations. We describe here the first experimental evidence of electrical magnetochiral anisotropy in these crystals, confirming the chiral character of charge transport in our molecular materials. Electrical magnetochiral anisotropy phenomenon describes the change in resistance of chiral materials caused by the interplay between chirality, conductivity and magnetic fields. Pop et al. show here for the first time the occurrence of this phenomenon in a bulk chiral molecular conductor.
ISSN:2041-1723
2041-1723
DOI:10.1038/ncomms4757