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On the link between polyamorphism and liquid-liquid transition: The case of salty water
Ist Teil von
The Journal of chemical physics, 2019-07, Vol.151 (4), p.044503-044503
Ort / Verlag
United States: American Institute of Physics
Erscheinungsjahr
2019
Link zum Volltext
Quelle
AIP Journals Complete
Beschreibungen/Notizen
We investigate a LiCl:6D2O water solution in the deep undercooled regime as a function of pressure by neutron diffraction, small angle neutron scattering, and molecular dynamics simulations. We probe the structure of the undercooled liquid and the existence of density fluctuations in the system along isotherms just above the observed first-order-like polymorphic transition in the solid between a high density amorphous (s-HDA) and a very high density amorphous (s-VHDA) form [L. E. Bove et al., Phys. Rev. Lett. 106, 125701 (2011)]. We observe a continuous pressure evolution of the structure factor of the liquid and the absence of density fluctuations when crossing the continuation line of the s-HDA and s-VHDA boundary. These results indicate that no liquid-liquid transition is observed in the system in correspondence with the solid polyamorphism.