Nonlinear dielectric relaxation of polar liquids

Tuhin Samanta, Dmitry V. Matyushov

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

Molecular dynamics of two water models, SPC/E and TIP3P, at a number of temperatures is used to test the Kivelson-Madden equation connecting single-particle and collective dielectric relaxation times through the Kirkwood factor. The relation is confirmed by simulations and used to estimate the nonlinear effect of the electric field on the dielectric relaxation time. We show that the main effect of the field comes through slowing down of the single-particle rotational dynamics and the relative contribution of the field-induced alteration of the Kirkwood factor is insignificant for water. Theories of nonlinear dielectric relaxation need to mostly account for the effect of the field on rotations of a single dipole in a polar liquid.

Original languageEnglish (US)
Article number119935
JournalJournal of Molecular Liquids
Volume364
DOIs
StatePublished - Oct 15 2022

Keywords

  • Dielectric spectroscopy
  • Kirkwood factor
  • Nonlinear dynamics
  • Polar relaxation
  • Water dynamics

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics
  • Spectroscopy
  • Physical and Theoretical Chemistry
  • Materials Chemistry

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