Lineshape of the thermopower of quantum dots

Quantum dots are an important model system for thermoelectric phenomena, and may be used to enhance the thermal-to-electric energy conversion efficiency in functional materials. It is therefore important to obtain a detailed understanding of a quantum-dot's thermopower as a function of the Ferm...

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Bibliographic Details
Published in:arXiv.org 2011-10
Main Authors: Svensson, S Fahlvik, Persson, A I, Hoffmann, E A, Nakpathomkun, N, Nilsson, H A, Xu, H Q, Samuelson, L, Linke, H
Format: Article
Language:English
Subjects:
Electron tunneling
Energy conversion efficiency
Functional materials
Quantum dots
Quantum theory
Resistance
Single electrons
Thermoelectricity
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Summary:Quantum dots are an important model system for thermoelectric phenomena, and may be used to enhance the thermal-to-electric energy conversion efficiency in functional materials. It is therefore important to obtain a detailed understanding of a quantum-dot's thermopower as a function of the Fermi energy. However, so far it has proven difficult to take effects of co-tunnelling into account in the interpretation of experimental data. Here we show that a single-electron tunnelling model, using knowledge of the dot's electrical conductance which in fact includes all-order co-tunneling effects, predicts the thermopower of quantum dots as a function of the relevant energy scales, in very good agreement with experiment.
ISSN:2331-8422
DOI:10.48550/arxiv.1110.0352