Wednesday Colloquia

Length scales and Timescales in Glass Transition Problem

by Dr. Smarajit Karmakar (TIFR Centre for Interdisciplinary Sciences (TCIS), Hyderabad)

Wednesday, November 26, 2014 from to (Asia/Kolkata)
at AG - 66 (Lecture Theatre) ( TIFR, Mumbai )
Description
ABSTRACT:
The glass transition problem where viscosity of liquids grows very rapidly with decreasing temperature is a subject of intense research and it is believed to be one of the most puzzling unsolved problems in the condensed matter physics. The question of whether there exists a static length scale that grows in accordance with this dramatic increase in viscosity also remained debated till now. In this talk I will discuss about some of the proposals for such a length scale and their connection to the time scale. Relevance of this static length scale was questioned in the community due to its small growth in the limited temperature range one can study these systems. Our recent effort bypasses some of these problems to reach lower temperature glassy states and the extracted length scale is found to grow in accordance with at least 15 orders of magnitude increase in the relaxation time, competing with the best experimental conditions.

References: 

1.  G. Biroli, S. Karmakar, I. Procaccia, Physical review letters 111 (16), 165701 (2013).
2.  R. GutiƩrrez, S. Karmakar, Y. G. Pollack, I. Procaccia - arXiv:1409.5067 (2014).

Organised by Sushil Mujumdar, Wednesday Colloquium Coordinator