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- W3080794265 abstract "We present a first principles based model of electron-phonon scattering mechanisms and thermoelectric transport at the L and $Sigma$ valleys in <200b>$p$-type PbTe, accounting for their thermally induced shifts. Our calculated values of all thermoelectric transport parameters at room temperature are in very good agreement with experiments for a wide range of doping concentrations. Scattering due to longitudinal optical phonons is the main scattering mechanism in $p$-type PbTe, while scattering due to transverse optical modes is the weakest. The L valleys contribute most to thermoelectric transport at 300 K due to the sizeable energy difference between the L and $Sigma$ valleys. We show that both scattering between the L and $Sigma$ valleys and additional transport channels of the $Sigma$ valleys are beneficial for the overall thermoelectric performance of $p$-type PbTe at 300 K. Our findings thus support the idea that materials with high valley degeneracy may be good thermoelectrics." @default.
- W3080794265 created "2020-09-01" @default.
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- W3080794265 date "2020-09-23" @default.
- W3080794265 modified "2023-10-16" @default.
- W3080794265 title "Electron-phonon scattering and thermoelectric transport in <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML><mml:mi>p</mml:mi></mml:math> -type PbTe from first principles" @default.
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- W3080794265 doi "https://doi.org/10.1103/physrevb.102.115204" @default.
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