Which mechanism limits electron mobility in semiconductors with narrower band gaps at constant temperatures?

💡 Explanation

Increased thermal energy in a small band gap leads to a higher phonon population; therefore, electron-phonon scattering increases which limits electron mobility because the dominant mechanism is acoustic phonon scattering, rather than other electronic band transitions needing higher energy photons.

• Which consequence results when exceeding the coherence length within a pulsed laser amplifier?
• Which consequence results when capacitive reactance drops sharply in an improperly shielded avionics field bus?
• Which outcome reduces accuracy when using a pitot tube due to an increased Reynolds number?
• Which mechanism limits microprocessor clock frequency scaling when quantum tunneling effects increase in significance?
• Which outcome occurs when an internal combustion engine's air-fuel mixture auto-ignites prior to spark?
• Which outcome accompanies exceeding hydraulic fluid's cavitation limit?