Significant Phonon Drag Enables High Power Factor in the AlGaN/GaN Two-Dimensional Electron Gas
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Phonon drag treated as a component of the Seebeck coefficient: up to 32 % (88 %) of the Seebeck coefficient at 300 K (50 K) in a ~1.2 μm GaN film, negligible at ~100 nm; power factor up to ~40 mW m⁻¹ K⁻² at 50 K (abstract).
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- Temperature gradient → Heat conduction → Phonons → Phonon drag → Charge carriers → Electrical work5/5 established
- Chemical potential difference → Combustion → Temperature gradient → Heat conduction → Phonons → Phonon drag → Charge carriers → Electrical work7/7 established
- Electric potential difference → Peltier effect → Temperature gradient → Heat conduction → Phonons → Phonon drag → Charge carriers → Electrical work7/7 established
- Electric potential difference → Ettingshausen effect → Temperature gradient → Heat conduction → Phonons → Phonon drag → Charge carriers → Electrical work7/7 established
- Incident radiation flux → Photothermal absorption → Temperature gradient → Heat conduction → Phonons → Phonon drag → Charge carriers → Electrical work7/7 established
- Radiative imbalance with the sky → Radiative sky cooling → Temperature gradient → Heat conduction → Phonons → Phonon drag → Charge carriers → Electrical work7/7 established
- Nuclear binding-energy difference → Nuclear fission → Temperature gradient → Heat conduction → Phonons → Phonon drag → Charge carriers → Electrical work7/7 established
- Nuclear binding-energy difference → Nuclear fusion → Temperature gradient → Heat conduction → Phonons → Phonon drag → Charge carriers → Electrical work5/7 established
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Physical Transformation Atlas (2026). source source:yalamarthy-2019-phonon-drag: Significant Phonon Drag Enables High Power Factor in the AlGaN/GaN Two-Dimensional Electron Gas. Dataset revision rbfbfcbb70e57 (hash of the canonical data). https://physical-transformation-atlas.wldud5192.workers.dev/source/yalamarthy-2019-phonon-drag
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