How do electronic carriers cross Si-bound alkyl monolayers?

Adi Salomon, Till Boecking, Calvin K. Chan, Fabrice Amy, Olga Girshevitz, David Cahen, Antoine Kahn

Research output: Contribution to journalArticlepeer-review

126 Scopus citations


Electron transport through Si-C bound alkyl chains, sandwiched between n-Si and Hg, is characterized by two distinct types of barriers, each dominating in a different voltage range. At low voltage, the current depends strongly on temperature but not on molecular length, suggesting transport by thermionic emission over a barrier in the Si. At higher voltage, the current decreases exponentially with molecular length, suggesting transport limited by tunneling through the molecules. The tunnel barrier is estimated, from transport and photoemission data, to be ∼1.5eV with a 0.25me effective mass.

Original languageEnglish (US)
Article number266807
JournalPhysical review letters
Issue number26
StatePublished - Dec 31 2005

All Science Journal Classification (ASJC) codes

  • General Physics and Astronomy


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