Thermoelectric signatures of coherent transport in single-molecule heterojunctions

J. P. Bergfield, Charles A Stafford

Research output: Contribution to journalArticle

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Abstract

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 ) (π/3 1/2)(k B/e) and L max ) (7π 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.

Original languageEnglish (US)
Pages (from-to)3072-3076
Number of pages5
JournalNano Letters
Volume9
Issue number8
DOIs
Publication statusPublished - Aug 12 2009

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ASJC Scopus subject areas

  • Condensed Matter Physics
  • Bioengineering
  • Chemistry(all)
  • Materials Science(all)
  • Mechanical Engineering

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