Live Quiz Arena
🎁 1 Free Round Daily
⚡ Enter ArenaQuestion
← ScienceWhich outcome occurs when a doped semiconductor's crystal lattice reaches cryogenic temperatures?
A)Increased electron-phonon scattering reduces mobility
B)Impurity band merges with conduction band✓
C)Electron-hole recombination rate plateaus sharply
D)Ferromagnetic domains spontaneously align fully
💡 Explanation
As a semiconductor crystal lattice approaches absolute zero, the thermal energy decreases; dopant ionization energy drops sharply leading to the merging of the impurity band with the conduction band, therefore increasing conductivity rather than reducing mobility because lattice displacement decreases at those levels.
🏆 Up to £1,000 monthly prize pool
Ready for the live challenge? Join the next global round now.
*Terms apply. Skill-based competition.
Related Questions
Browse Science →- Which effect on rocket propellant performance appears when combustion temperature plateaus during catalytic decomposition?
- Which electronic characteristic affects silicon doping during transistor fabrication?
- Which error results when truncating Fourier series terms?
- Which consequence results when the reflective coating fails on interferometer optics?
- Which critical outcome prevents persistent currents in quench-protected superconducting magnets?
- Which consequence results when vacuum-entangled photons interact destructively?
