Electrical magnetochiral anisotropy

There are two reasons for studying enantiomerically pure conductors. The first is connected with questions of structure. In effect, it is possible, starting from enantiopure bricks, to prepare crystal structures that are noncentrosymmetric, and which allow the disorder to be limited compared to the racemic derivatives. The second reason is linked to the fact that, for chiral conductors in an enantiopure form, theory predicts the existence of an effect called electrical magnetochiral anisotropy (EMCA) due to the simultaneous breaking of space and time symmetry in the presence of an external magnetic field. Thus, the resistivity of a chiral conductor depends on its absolute configuration according to the formula ... 

Throughout this chapter we have presented some examples of chiral enantiopure molecular materials. We have shown that chirality in molecular materials is not only a particular property governing the rotation sense of polarized light, but it also influences the solid state organization of materials and consequently their physical properties. Multifunctional enantiopure materials can also be at the forefront of such new phenomena as magnetochiral anisotropy or electric magnetochiral anisotropy. 

Rikken GLJA, Foiling J, Wyder P (2001) Electrical magnetochiral anisotropy. Phys Rev Lett 87 236602... 

Pop F, Auban-Senzier P, Canadell E, Rikken GLJA, Avarvari N (2014) Electrical magnetochiral anisotropy in a bulk chiral molecular conductor. Nat Commun 5(3757) 1-6... 

In conclusion, we have described our observations of magnetochiral anisotropy in luminescence, absorption, asymmetric photochemistry, and electrical resistiv-... 

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