Gate control of the conduction mechanism transition from tunneling to thermally activated hopping

Liang Yan Hsu, Ning Wu, Herschel Rabitz

Research output: Contribution to journalArticle

11 Scopus citations

Abstract

We explore gate control of electron transport through molecules with different repeat units. In the framework of reduced density matrix theory, the computational results show (i) exponential decay in the tunneling regime and (ii) Arrhenius behavior and similar activation energies in the hopping regime, which are qualitatively consistent with experimental observations. Moreover, the gate enables tuning of the activation energy, indicating that the continuous transition from tunneling to hopping could be experimentally observed. The activation energy-gate voltage characteristics are introduced to investigate different conduction regimes.

Original languageEnglish (US)
Pages (from-to)1831-1836
Number of pages6
JournalJournal of Physical Chemistry Letters
Volume5
Issue number11
DOIs
StatePublished - Jun 5 2014

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Physical and Theoretical Chemistry

Keywords

  • activation energy
  • conductance
  • electron transfer
  • molecular electronics
  • quantum transport
  • reduced density matrix theory

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