dc.contributor.advisor |
Sastry, Srikanth |
|
dc.contributor.author |
Sengupta, Shiladitya |
|
dc.date.accessioned |
2021-01-28T10:03:10Z |
|
dc.date.available |
2021-01-28T10:03:10Z |
|
dc.date.issued |
2013 |
|
dc.identifier.citation |
Sengupta, Shiladitya. 2013, Investigations of the role of spatial dimensionality and interparticle interactions in model glass-formers, Ph.D thesis, Jawaharlal Nehru Centre for Advanced Scientific Research, Bengaluru |
en_US |
dc.identifier.uri |
https://libjncir.jncasr.ac.in/xmlui/handle/123456789/3069 |
|
dc.description.abstract |
Liquids and solids are low temperature phases of matter and are ubiqui-
tous in nature. When a liquid is cooled to temperature below the freezing
temperature, under equilibrium condition, it undergoes a first order phase
transition to a crystalline solid. However a finite amount of time is required
for the development (“nucleation”) of crystalline order (“nucleation time”
τnucleation). Similarly, a finite amount of time (“relaxation time” τrelaxation) is
required for the liquid to reach equilibrium at a given temperature T. The
typical temperature dependence of τnucleation and τrelaxation are schematically
shown in Fig. 1.1(a) (the red and the blue lines respectively). Typically, as
a liquid is cooled, τnucleation goes through a minimum (because it is deter-
mined by the competition between (i) a free energy barrier-crossing prob-
ability which increases monotonically and (ii) the mobility which decreases
monotonically as T decreases) and τrelaxation increases monotonically. Fur-
ther τnucleation > τrelaxation at any given T so that the two curves do not
intersect each other. Thus there is the following interesting possibility : if
a liquid is cooled with a cooling rate such that the amount of time spent
at a given temperature is more than τrelaxation but less than τnucleation then
it can avoid crystallization and can remain in the liquid phase even below
its freezing point. This is the window between the red (non-monotonic) line
and the blue (monotonic) line at any given temperature in Fig. 1.1(a). |
en_US |
dc.language.iso |
English |
en_US |
dc.publisher |
Jawaharlal Nehru Centre for Advanced Scientific Research |
en_US |
dc.rights |
© 2013 JNCASR |
|
dc.subject |
Glass- formers |
en_US |
dc.title |
Investigations of the role of spatial dimensionality and interparticle interactions in model glass-formers |
en_US |
dc.type |
Thesis |
en_US |
dc.type.qualificationlevel |
Doctoral |
en_US |
dc.type.qualificationname |
Ph.D. |
en_US |
dc.publisher.department |
Theoretical Sciences Unit (TSU) |
en_US |