Universality in the fast orientational relaxation near isotropic-nematic transition


Autoria(s): Ravichandran, S; Perera, A; Moreau, M; Bagchi, B
Data(s)

01/11/1998

Resumo

Detailed molecular dynamics simulations of Lennard-Jones ellipsoids have been carried out to investigate the emergence of criticality in the single-particle orientational relaxation near the isotropic-nematic (IN) phase transition. The simulations show a sudden appearance of a power-law behavior in the decay of the second-rank orientational relaxation as the IN transition is approached. The simulated value of the power-law exponent is 0.56, which is larger than the mean-field value (0.5) but less than the observed value (0.63) and may be due to the finite size of the simulated system. The decay of the first-rank orientational time correlation function, on the other hand, is nearly exponential but its decay becomes very slow near the isotropic-nematic transition, The zero-frequency rotational friction, calculated from the simulated angular Velocity correlation function, shows a marked increase near the IN transition.

Formato

application/pdf

Identificador

http://eprints.iisc.ernet.in/19431/1/Universality_in_the_fast_orientational.pdf

Ravichandran, S and Perera, A and Moreau, M and Bagchi, B (1998) Universality in the fast orientational relaxation near isotropic-nematic transition. In: Journal of Chemical Physics, 109 (17). pp. 7349-7353.

Publicador

American Institute Physics

Relação

http://adsabs.harvard.edu/abs/1998JChPh.109.7349R

http://eprints.iisc.ernet.in/19431/

Palavras-Chave #Solid State & Structural Chemistry Unit
Tipo

Journal Article

PeerReviewed