Effects of Anisotropy on the Electron Transport of 4H-SiC

High lattice temperature effects on the electron transport transient in the 4H-SiC c-parallel direction are studied within a single equivalent isotropic valley picture in the momentum and energy relaxation time approximation. The ultrafast transport regime occurs in a subpicosecond scale (<0.2ps), during which an overshoot in the electron drift velocity starts to be evident for high electric fields (≳60kV∕cm), depending on the lattice temperature. An increase of the electric field strength shifts the overshoot peak of the electron drift velocity to an earlier time. For a strong enough electric field, a higher lattice temperature cannot eliminate the electron drift overshoot effect, but can reduce it considerably due to a stronger electron-phonon scattering.

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Effects of Anisotropy on the Electron Transport of 4H-SiC

Cited by 3 publications

References 13 publications

Band structure anisotropy effects on the ultrafast electron transport in 4H-SiC

Band structure anisotropy effects on the ultrafast electron transport in 4H-SiC

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High lattice temperature effects on the ultrafast electron transport in 4H-SiC

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