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Large Thermoelectric Power Factor Enhancement Observed in InAs Nanowires

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journal contribution
posted on 18.02.2016 by Phillip M. Wu, Johannes Gooth, Xanthippi Zianni, Sofia Fahlvik Svensson, Jan Göran Gluschke, Kimberly A. Dick, Claes Thelander, Kornelius Nielsch, Heiner Linke
We report the observation of a thermoelectric power factor in InAs nanowires that exceeds that predicted by a single-band bulk model by up to an order of magnitude at temperatures below about 20 K. We attribute this enhancement effect not to the long-predicted 1D subband effects but to quantum-dot-like states that form in electrostatically nonuniform nanowires as a result of interference between propagating states and 0D resonances.