By means of Raman spectroscopy of liquid microjets, we have investigated the crystallization process of supercooled quantum liquid mixtures composed of parahydrogen (pH<inf>2</inf>) or orthodeuterium (oD<inf>2</inf>) diluted with small amounts of neon. We show that the introduction of the Ne impurities affects the crystallization kinetics in terms of a significant reduction of the measured pH<inf>2</inf> and oD<inf>2</inf> crystal growth rates, similarly to what found in our previous work on supercooled pH<inf>2</inf>-oD<inf>2</inf> liquid mixtures [Kühnel et al., Phys. Rev. B 89, 180201(R) (2014)]. Our experimental results, in combination with path-integral simulations of the supercooled liquid mixtures, suggest in particular a correlation between the measured growth rates and the ratio of the effective particle sizes originating from quantum delocalization effects. We further show that the crystalline structure of the mixtures is also affected to a large extent by the presence of the Ne impurities, which likely initiate the freezing process through the formation of Ne-rich crystallites.
Mixing effects in the crystallization of supercooled quantum binary liquids / M. Kühnel, J.M. Fernández, F. Tramonto, G. Tejeda, E. Moreno, A. Kalinin, M. Nava, D.E. Galli, S. Montero, R.E. Grisenti. - In: THE JOURNAL OF CHEMICAL PHYSICS. - ISSN 0021-9606. - 143:6(2015).
|Titolo:||Mixing effects in the crystallization of supercooled quantum binary liquids|
|Parole Chiave:||Physics and Astronomy (all); Physical and Theoretical Chemistry|
|Settore Scientifico Disciplinare:||Settore FIS/03 - Fisica della Materia|
|Data di pubblicazione:||2015|
|Digital Object Identifier (DOI):||http://dx.doi.org/10.1063/1.4928280|
|Appare nelle tipologie:||01 - Articolo su periodico|