Microscopic expression for frequency and wave vector dependent dielectric constant of a dipolar liquid


Autoria(s): Chandra, Amalendu; Bagchi, Biman
Data(s)

01/02/1989

Resumo

A microscopic expression for the frequency and wave vector dependent dielectric constant of a dense dipolar liquid is derived starting from the linear response theory. The new expression properly takes into account the effects of the translational modes in the polarization relaxation. The longitudinal and the transverse components of the dielectric constant show vastly different behavior at the intermediate values of the wave vector k. We find that the microscopic structure of the dense liquid plays an important role at intermediate wave vectors. The continuum model description of the dielectric constant, although appropriate at very small values of wave vector, breaks down completely at the intermediate values of k. Numerical results for the longitudinal and the transverse dielectric constants are obtained by using the direct correlation function from the mean‐spherical approximation for dipolar hard spheres. We show that our results are consistent with all the limiting expressions known for the dielectric function of matter.

Formato

application/pdf

Identificador

http://eprints.iisc.ernet.in/33225/1/Microscopic_expression.pdf

Chandra, Amalendu and Bagchi, Biman (1989) Microscopic expression for frequency and wave vector dependent dielectric constant of a dipolar liquid. In: Journal of Chemical Physics, The, 90 (3). 1832 -1840.

Publicador

American Institute of Physics

Relação

http://jcp.aip.org/resource/1/jcpsa6/v90/i3/p1832_s1

http://eprints.iisc.ernet.in/33225/

Palavras-Chave #Solid State & Structural Chemistry Unit
Tipo

Journal Article

PeerReviewed