TY - JOUR
T1 - Measuring the configurational heat capacity of liquids
AU - Wang, Li Min
AU - Richert, Ranko
PY - 2007/10/31
Y1 - 2007/10/31
N2 - A high electric field impedance experiment on supercooled molecular liquids is employed to transfer energy to the slow modes by absorption from the field and detect the increase of their "configurational temperature", Tcfg, via the change of the relaxation times. This allows us to determine the configurational heat capacity, which accounts for most of the excess heat capacity for stronger liquids, but for only half of the heat capacity step in the case of more fragile systems. It is also observed that Tcfg gradually approaches the phonon temperature on the structural relaxation time scale.
AB - A high electric field impedance experiment on supercooled molecular liquids is employed to transfer energy to the slow modes by absorption from the field and detect the increase of their "configurational temperature", Tcfg, via the change of the relaxation times. This allows us to determine the configurational heat capacity, which accounts for most of the excess heat capacity for stronger liquids, but for only half of the heat capacity step in the case of more fragile systems. It is also observed that Tcfg gradually approaches the phonon temperature on the structural relaxation time scale.
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U2 - 10.1103/PhysRevLett.99.185701
DO - 10.1103/PhysRevLett.99.185701
M3 - Article
AN - SCOPUS:35948935280
SN - 0031-9007
VL - 99
JO - Physical Review Letters
JF - Physical Review Letters
IS - 18
M1 - 185701
ER -