We present a critical comparison of the dielectric properties of three models of water—TIP4P/2005, TIP4P/2005f, and TTM3F. Dipole spatial correlation is measured using the distance dependent Kirkwood function along with one-dimensional and two-dimensional dipole correlation functions. We find that the introduction of flexibility alone does not significantly affect dipole correlation and only affects ɛ(ω) at high frequencies. By contrast the introduction of polarizability increases dipole correlation and yields a more accurate ɛ(ω). Additionally, the introduction of polarizability creates temperature dependence in the dipole moment even at fixed density, yielding a more accurate value for dɛ/dT compared to non-polarizable models. To better understand the physical origin of the dielectric properties of water we make analogies to the physics of polar nanoregions in relaxor ferroelectric materials. We show that ɛ(ω, T) and τD(T) for water have striking similarities with relaxor ferroelectrics, a class of materials characterized by large frequency dispersion in ɛ(ω, T), Vogel-Fulcher-Tammann behaviour in τD(T), and the existence of polar nanoregions.
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28 March 2014
Research Article|
March 25 2014
Polar nanoregions in water: A study of the dielectric properties of TIP4P/2005, TIP4P/2005f and TTM3F Available to Purchase
D. C. Elton;
D. C. Elton
1Department of Physics and Astronomy,
Stony Brook University
, Stony Brook, New York 11794-3800, USA
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M.-V. Fernández-Serra
M.-V. Fernández-Serra
1Department of Physics and Astronomy,
Stony Brook University
, Stony Brook, New York 11794-3800, USA
2Institute for Advanced Computational Sciences,
Stony Brook University
, Stony Brook, New York 11794-3800, USA
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D. C. Elton
1
M.-V. Fernández-Serra
1,2
1Department of Physics and Astronomy,
Stony Brook University
, Stony Brook, New York 11794-3800, USA
2Institute for Advanced Computational Sciences,
Stony Brook University
, Stony Brook, New York 11794-3800, USA
J. Chem. Phys. 140, 124504 (2014)
Article history
Received:
January 22 2014
Accepted:
March 10 2014
Citation
D. C. Elton, M.-V. Fernández-Serra; Polar nanoregions in water: A study of the dielectric properties of TIP4P/2005, TIP4P/2005f and TTM3F. J. Chem. Phys. 28 March 2014; 140 (12): 124504. https://doi.org/10.1063/1.4869110
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