Coulomb-blockade transport in selectively-doped Si nano-transistors

Adnan Afiff, Arup Samanta, Arief Udhiarto, Harry Sudibyo, Masahiro Hori, Yukinori Ono, Michiharu Tabe, Daniel Moraru

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)


Coulomb-blockade transport via donors working as quantum dots (QDs) in Si nano-transistor channels opens new pathways for atomic-level applications, but position-control of such QDs remains challenging. Here, we demonstrate that multiple-donor cluster-QDs can be formed by CMOS-compatible selective-doping, as observed from Coulomb-blockade transport at low temperature (T = 5.5 K). While at high gate voltage electron tunneling takes place via extended QDs, likely due to line edge roughness of the nanoscale channel, at low gate voltage tunneling occurs via a cluster of intentionally-doped donors. For the interpretation, we introduce a model of an isolated donor-cluster as a QD with voltage-dependent tunnel resistances.

Original languageEnglish
Article number085004
JournalApplied Physics Express
Issue number8
Publication statusPublished - 1 Jan 2019


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