A microscopic approach for the description of critical phenomena in mixtures is presented. Near the critical point, the theory develops a renormalization group structure which allows for the identification of several possible critical behaviours corresponding to different fixed points. For a generic neutral binary mixture, the most stable fixed point gives rise to the same critical exponents as predicted by the well known phenomenological approach, providing a microscopic mechanism for such a behaviour. The order parameter psi is identified and two exact relations expressing psi in terms of experimentally accessible quantities are given. As an example, some results for the neon-krypton mixture are presented.
Theory of phase transitions in binary mixtures / A. Parola, D. Pini, L. Reatto. - In: JOURNAL OF PHYSICS. CONDENSED MATTER. - ISSN 0953-8984. - 6:23 A(1994 Jun), pp. A167-A170. [10.1088/0953-8984/6/23A/023]
Theory of phase transitions in binary mixtures
D. PiniSecondo
;L. ReattoUltimo
1994
Abstract
A microscopic approach for the description of critical phenomena in mixtures is presented. Near the critical point, the theory develops a renormalization group structure which allows for the identification of several possible critical behaviours corresponding to different fixed points. For a generic neutral binary mixture, the most stable fixed point gives rise to the same critical exponents as predicted by the well known phenomenological approach, providing a microscopic mechanism for such a behaviour. The order parameter psi is identified and two exact relations expressing psi in terms of experimentally accessible quantities are given. As an example, some results for the neon-krypton mixture are presented.File | Dimensione | Formato | |
---|---|---|---|
jpcm_flor.pdf
accesso solo dalla rete interna
Tipologia:
Publisher's version/PDF
Dimensione
210.37 kB
Formato
Adobe PDF
|
210.37 kB | Adobe PDF | Visualizza/Apri Richiedi una copia |
Pubblicazioni consigliate
I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.