Dielectric function and phonon spectrum of grey tin |
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| Authors: | RP Gupta SK Sinha JP Walter Marvin L Cohen |
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| Institution: | Ames Laboratory-USAEC and Department of Physics, Iowa State University, Ames, Iowa 50010, U.S.A.;Department of Physics, University of California and Inorganic Materials Research Division, Lawrence Berkeley Laboratory, Berkeley, California 94720, U.S.A. |
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| Abstract: | The dielectric function of α-Sn has been evaluated from a pseudopotential calculation of the valence electron wavefunctions and energy bands. The result is used, together with an approximate method of calculating the inverse of the dielectric function matrix, to calculate the phonon dispersion curves. Fairly good overall agreement with the experimental dispersion curves has been obtained. |
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