Short- and long-range correlated motion observed in colloidal glasses and liquids (original) (raw)

NASA/ADS

;

• Crocker, John C. ;
• Weitz, D. A.

Abstract

We use a confocal microscope to examine the motion of individual particles in a dense colloidal suspension. Close to the glass transition, particle motion is strongly spatially correlated. The correlations decay exponentially with particle separation, yielding a dynamic length scale of O(2-3σ) (in terms of particle diameter σ). This length scale grows modestly as the glass transition is approached. Further, the correlated motion exhibits a strong spatial dependence on the pair correlation function g(r). Motion within glassy samples is weakly correlated, but with a larger spatial scale for this correlation.

Publication:

Journal of Physics Condensed Matter

Pub Date:

May 2007

DOI:

10.1088/0953-8984/19/20/205131

arXiv:

arXiv:cond-mat/0610195

Bibcode:

2007JPCM...19t5131W

Keywords:

• Condensed Matter - Disordered Systems and Neural Networks;
• Condensed Matter - Soft Condensed Matter

E-Print:

Submitted to J Phys: Cond Mat