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- W4361289875 abstract "The past decade has seen the emergence of ab initio computational methods for calculating phonon-limited carrier mobilities in semiconductors with predictive accuracy. More realistic calculations ought to take into account additional scattering mechanisms such as, for example, impurity and grain-boundary scattering. In this paper, we investigate the effect of ionized-impurity scattering on the carrier mobility. We model the analytical impurity potential parameterized from first principles by a collection of randomly distributed Coulomb scattering centers, and we include this relaxation channel into the ab initio Boltzmann transport equation, as implemented in the EPW code. We demonstrate this methodology by considering silicon, silicon carbide, and gallium phosphide, for which detailed experimental data are available. Our calculations agree well with experiments over a broad range of temperatures and impurity concentrations. For each compound investigated here, we compare the relative importance of electron-phonon scattering and ionized-impurity scattering, and we critically assess the reliability of Matthiessen's rule. We also show that an accurate description of dielectric screening and carrier effective masses can improve quantitative agreement with experiments." @default.
- W4361289875 created "2023-03-31" @default.
- W4361289875 creator A5002318539 @default.
- W4361289875 creator A5016290509 @default.
- W4361289875 creator A5022593514 @default.
- W4361289875 creator A5062146876 @default.
- W4361289875 date "2023-03-29" @default.
- W4361289875 modified "2023-10-14" @default.
- W4361289875 title "<i>Ab initio</i> calculation of carrier mobility in semiconductors including ionized-impurity scattering" @default.
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