scholarly journals The reversibility and first-order nature of liquid–liquid transition in a molecular liquid

2016 ◽  
Vol 7 (1) ◽  
Author(s):  
Mika Kobayashi ◽  
Hajime Tanaka
Keyword(s):  
First Order ◽  
Molecular Liquid ◽  
Liquid Transition

scholarly journals Microscopic identification of the order parameter governing liquid–liquid transition in a molecular liquid

2015 ◽  
Vol 112 (19) ◽  
pp. 5956-5961 ◽  
Author(s):  
Ken-ichiro Murata ◽  
Hajime Tanaka
Keyword(s):  
Order Parameter ◽  
Structural Evolution ◽  
Characteristic Size ◽  
Number Density ◽  
Time Resolved ◽  
X Ray ◽  
Molecular Liquid ◽  
X Ray Scattering ◽  
Liquid Transition ◽  
Scattering Measurements

A liquid–liquid transition (LLT) in a single-component substance is an unconventional phase transition from one liquid to another. LLT has recently attracted considerable attention because of its fundamental importance in our understanding of the liquid state. To access the order parameter governing LLT from a microscopic viewpoint, here we follow the structural evolution during the LLT of an organic molecular liquid, triphenyl phosphite (TPP), by time-resolved small- and wide-angle X-ray scattering measurements. We find that locally favored clusters, whose characteristic size is a few nanometers, are spontaneously formed and their number density monotonically increases during LLT. This strongly suggests that the order parameter of LLT is the number density of locally favored structures and of nonconserved nature. We also show that the locally favored structures are distinct from the crystal structure and these two types of orderings compete with each other. Thus, our study not only experimentally identifies the structural order parameter governing LLT, but also may settle a long-standing debate on the nature of the transition in TPP, i.e., whether the transition is LLT or merely microcrystal formation.

The Melting of Amorphous Si

1985 ◽  
Vol 57 ◽  
Author(s):  
J. M. Poate ◽  
P. S. Peercy ◽  
M. O. Thompson
Keyword(s):  
Melting Temperature ◽  
Pulsed Laser ◽  
Laser Melting ◽  
First Order ◽  
Explosive Crystallization ◽  
Liquid Transition ◽  
Melting Transitions ◽  
Amorphous Si

AbstractThe prediction by Turnbull and his colleagues that amorphous Si and Ge undergo first order melting transitions at temperatures Taℓ substantially beneath the crystalline melting temperature Tcℓ has stimulated much work. Structural, calorimet:ic and transient conductance measurements show that, for Si, Tcℓ – Taℓ lies in the range 225–250°K. Studies of the pulsed laser melting of the Si amorphous-liquid transition have resulted in the following findings, an estimate of the undercooling rate of 15°K/m/sec, an understanding of the mechanism mediating explosive crystallization, the formation of internal melts and segregation of dopants at the liquid-amorphous interface.

DEFECT THEORY OF SOLID–LIQUID TRANSITION AND INTERFACE

1993 ◽  
Vol 07 (21) ◽  
pp. 1373-1381
Author(s):  
A. FERRAZ
Keyword(s):  
Field Theory ◽  
Phase Transition ◽  
Surface Tension ◽  
Theory Model ◽  
Planar Interface ◽  
Elastic Continuum ◽  
First Order ◽  
Liquid Transition ◽  
The Stability ◽  
Solid Liquid

In this work, we develop a field theory model for the solid–liquid transition and planar interface induced by dislocation lines in an elastic continuum. We show that the phase transition which emerges from our model is of first order kind. We calculate the interface solution, the surface tension and, finally, we end up discussing the stability of the field solutions.

scholarly journals The puzzling first-order phase transition in water–glycerol mixtures

2015 ◽  
Vol 17 (27) ◽  
pp. 18063-18071 ◽  
Author(s):  
Ivan Popov ◽  
Anna Greenbaum (Gutina) ◽  
Alexei P. Sokolov ◽  
Yuri Feldman
Keyword(s):  
Phase Transition ◽  
Order Phase Transition ◽  
First Order ◽  
First Order Phase Transition ◽  
Liquid Transition ◽  
Water Glycerol ◽  
First Order Phase

Over the last decade, discussions on a possible liquid–liquid transition (LLT) have strongly intensified.

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