Residual Resistivity Due to Vacancies in Alkali Metals

Abstract

We have used a pseudopotential technique to examine the contribution of monovacancy, whicl is one of the point defects, to the resistivity of alkali metals. Two dicherent forms of the bare-ion local pseudopotential, to describe the electron-ion interaction in metals, have been employed in the present work. Various forms of the dielectric function lave been used to incorporate the exchange and correlation echects among the conduction electrons. Varying effect of dielectric functions on the computed results is concluded while comparing our findings with other theoreticał data.

Thermodynamic Properties of Liquid Alkali Metals

“…The different forms of the model potential have generated different values of the thermodynamic properties. Hence, we thought it worthwhile to investigate thermodynamic properties of alkalies using our model potential [18][19][20].…”

“…In the present work we choose the hard sphere reference system which provides analytical representation in term of single parameter, σ known as hard sphere diameter [21,22] and instead of working with historical model potentials like AS model and HA model, we have used our own single parametric model to describe electron-ion interaction [18][19][20].…”

Electron Dispersion in Liquid Alkali Metals

“…The pseudopotential based investigation of the Fermi surface and its distortion from free-electron value for the metals in the solid phase are quite often and well recognized [1,2]. However, the attempts of studying the Fermi energy and its deviation from the free electron value for liquid metals are very rare and not exhaustive [3,4].…”

“…Present article deals with the computation of the electron dispersion, Fermi energy and deviation in the Fermi energy of liquid alkali metals with the aim to explore the use of our well established empirical form of the local pseudopotential [1,2,[5][6][7] for understanding the behavior of these properties. The local pseudopotential used to explain the electron-ion interaction in liquid metals is of the form (in Rydberg units) [1,2,[5][6][7]:…”

“…Thus the determination of the parameter bears prime importance. Instead of fitting the parameter of the model potential with any observed physical property, the well recognized method [1,2,[5][6][7] of q = q0 value is used to determine the parameter of the potential. The requirement to determine the parameter rc from q0 value leads to the condition q 0 rc = 1.0301 [1,2,[5][6][7].…”