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Anomalous enhancement of thermoelectric power factor in multiple two-dimensional electron gas system
Here, we pay attention to another effect caused by confining electrons spatially along one-dimensional direction: multiplied 2DEG effect, where multiple discrete subbands contribute to electrical conduction, resulting in high Seebeck coefficient. The power factor of multiple 2DEG in GaAs reaches the ultrahigh value of ~100 μWcm-1K-2 at 300 K. We evaluate the enhancement rate defined as power factor of 2DEG divided by that of three-dimensional bulk. The experimental enhancement rate relative to the theoretical one of conventional 2DEG reaches anomalously high (~4) in multiple 2DEG compared with those in various conventional 2DEG systems (~1). This proposed methodology for power factor enhancement opens the next era of thermoelectric research.
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- 16/01/2024
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- 19/01/2024
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41467_2023_44165_MOESM1_ESM.pdf | 1.1 MB | MDR Open |
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s41467-023-44165-3.pdf | 1.23 MB | MDR Open |
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