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Residual Resistivity Due to Vacancies in Alkali Metals

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Gajjar P. N., Thakore B. Y., Luhar J. S., Jani A. R.

Acta Physica Polonica A

1994

vol. 86

issue 3

369-374

We have used a pseudopotential technique to examine the contribution of monovacancy, which is one of the point defects, to the resistivity of alkali metals. Two different 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 effects among the conduction electrons. Varying effect of dielectric functions on the computed results is concluded while comparing our findings with other theoretical data.

On Phonon Dispersion in Alkali Metals

100%

Gajjar P. N., Thakore B. Y., Patel H. K., Jani A. R.

Acta Physica Polonica A

1995

vol. 88

issue 3

489-502

In the present paper, the calculation of the phonon dispersion relations for alkali metals to second order in a local pseudopotential is discussed in terms of the real-space sum. Different forms of dielectric functions are employed to judge the varying effects of exchange and correlation on the phonon frequencies. The quantitative agreement of phonon frequencies for the alkali metals reflects, satisfactorily, the experimental trend.

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2 Acta Physica Polonica A

1 1995

1 1994

2 Gajjar P. N.

2 Jani A. R.

2 Thakore B. Y.

1 Luhar J. S.

1 Patel H. K.

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Residual Resistivity Due to Vacancies in Alkali Metals

On Phonon Dispersion in Alkali Metals