Pronounced variation in the collective dynamics of highly correlated lightest liquid alkali metal: Lithium

Tewari, Surya P.; Dhingra, Grima; Silotia, Poonam; Sood, Jyoti

doi:10.1016/j.jnoncrysol.2011.07.027

Cited by 5 publications

(2 citation statements)

References 23 publications

(53 reference statements)

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“…Modified microscopic theory of simple fluids has proven to be a self-consistent theory which has successfully explained the collective dynamics of a number of fluids with different extent of correlations and different degrees of disorder [5][6][7][8][9][10]. This theoretical approach evolves the solution of microscopic equation of motion for an interacting and correlated system of particles.…”

Section: Theorymentioning

confidence: 99%

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Microscopic Transport Phenomena in a Liquid Alkali Metal K39

Dhingra¹

2019

IJSRPAS

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Microscopic equations of an interacting and correlated system of particles has been solved to compute two of the transport properties, namely diffusion coefficient and longitudinal viscosity, of liquid potassium near its melting point, at 343K, for a wave vector range: 0.9 nm −1 to 17.0 nm −1 . The present theoretical approach uses microscopic theory as a tool to compute the detailed dynamical structure factor, current-current correlation function and hence, the diffusion coefficient as well as the coefficient of longitudinal viscosity. Microscopic theory uses interparticle-interaction present among particles of a liquid to yield density-density response function and hence, its complete dynamics. The diffusion coefficient is evolved as a realistic parameter which has been fit to explain the experimental dynamical structure factors. The coefficient of longitudinal viscosity on the other hand is directly related to static structure factor and diffusion coefficient in the regime where wavevector and frequency approaches zero. It also depends upon velocity of sound which, in the present communication, has been calculated from peak positions of current-current correlation functions in the limit wavevector approaches zero. Computed results for both of the transport coefficients, self diffusion coefficient and longitudinal viscosity are found to agree well with the corresponding experimentally reported values.

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Section: Theorymentioning

confidence: 99%

“…where, E  , is maximum elastic frequency which is related to inter atomic interaction potential V(r) and static pair correlation function g(r) [10,12].…”

Section: Mathematical Formalismmentioning

confidence: 99%