Random telegraph signal and spin characteristics of the gate-all-around poly-silicon nanowire

Tsung Han Lee, Yan Ting Li, Shu-Fen Hu

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An arsenic (As)-doped poly-silicon nanowire gate-all-around transistor fabricated using standard semiconductor methods was used to measure the Coulomb blockade effect by applying a tunable gate voltage. Two-level trapping states due to the random telegraph signal of fluctuating drain current were observed in the silicon transport channel. Under high magnetic fields, the superposition points of differential conductance revealed weak 2-electron singlet-triplet splitting states of the arsenic magnetic impurity. The weak spin-orbital coupling suggests that the electron-spin-polarization in the As-doped silicon nanowire and the two-level trapping state coexisted in the Coulomb blockade oscillations. These characteristics indicate that a few arsenic donors strongly affect the quantum behavior of the poly-silicon material.

Original languageEnglish
Article number174508
JournalJournal of Applied Physics
Issue number17
Publication statusPublished - 2014 Jan 1


ASJC Scopus subject areas

  • Physics and Astronomy(all)

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