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- W3189028950 abstract "Abstract Since the invention of transistors, the flow of electrons has become controllable in solid-state electronics. The flow of energy, however, remains elusive, and energy is readily dissipated to lattice via electron-phonon interactions. Hence, minimizing the energy dissipation has long been sought by eliminating phonon-emission process. Here, we report a different scenario for facilitating energy transmission at room temperature that electrons exert diffusive but quasiadiabatic transport, free from substantial energy loss. Direct nanothermometric mapping of electrons and lattice in current-carrying GaAs/AlGaAs devices exhibit remarkable discrepancies, indicating unexpected thermal isolation between the two subsystems. This surprising effect arises from the overpopulated hot longitudinal-optical (LO) phonons generated through frequent emission by hot electrons, which induce equally frequent LO-phonon reabsorption (“hot-phonon bottleneck”) cancelling the net energy loss. Our work sheds light on energy manipulation in nanoelectronics and power-electronics and provides important hints to energy-harvesting in optoelectronics (such as hot-carrier solar-cells)." @default.
- W3189028950 created "2021-08-16" @default.
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- W3189028950 date "2021-08-06" @default.
- W3189028950 modified "2023-10-02" @default.
- W3189028950 title "Quasiadiabatic electron transport in room temperature nanoelectronic devices induced by hot-phonon bottleneck" @default.
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- W3189028950 doi "https://doi.org/10.1038/s41467-021-25094-5" @default.
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