期刊
PHYSICAL REVIEW B
卷 81, 期 15, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.81.153204
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资金
- EPSRC (U.K.) [EP/H004483]
Polarons-electrons coupled with lattice vibrations-play a key role in transport and optical properties of many semiconductors. Here, we calculate the energy spectrum and thermopower of Frohlich polarons confined to a potential well as a function of the well thickness. We show that the polaron mass enhancement in 2 + epsilon dimensions explains a giant thermoelectric power recently observed in doped semiconducting nanolayers (multiple quantum wells) and propose a route for enhancing the performance of thermoelectric energy nanoconverters by increasing their figure of merit by more than one order of magnitude.
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