期刊
NANO LETTERS
卷 9, 期 8, 页码 3072-3076出版社
AMER CHEMICAL SOC
DOI: 10.1021/nl901554s
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资金
- AzRISE
- TRIF Photonics Graduate Fellowship
An exact expression for the heat current in an interacting nanostructure is derived and used to calculate the thermoelectric response of three representative single-molecule junctions formed from isoprene, 1,3-benzenedithiol, and [18]-annulene. Dramatic enhancements of the thermopower S and Lorenz number L are predicted when the junction is tuned across a node in the transmission function, with universal maximum values S-max = (pi/3(1/2))(k(B)/e) and L-max = (7 pi(2)/5)(k(B)(2)/e(2)). The effect of a finite minimum transmission probability due, e.g., to incoherent processes or additional nonresonant channels, is also considered.
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