Electrical characteristics of asymmetrical silicon nanowire field-effect transistors

Soshi Sato, Kuniyuki Kakushima, Kenji Ohmori, Kenji Natori, Keisaku Yamada, Hiroshi Iwai

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)


This letter reports the electrical characteristics of nonuniform silicon nanowire nFETs with asymmetric source and drain widths. For electrostatic properties, reduced drain-induced barrier lowering (DIBL) is achieved in a device in which the source is wider than the drain. For carrier transport properties, higher values of surface-roughness-limited mobility (SR) are obtained in the sample with the wider drain size. Our electrostatic model shows that the concentration of lines of electric force is relaxed near the wider source edge, which results in smaller DIBL. The asymmetric SR is attributed to the channel surface morphology with (110)- and (100)-faceted surfaces.

Original languageEnglish
Article number223518
JournalApplied Physics Letters
Issue number22
Publication statusPublished - 2011 Nov 28

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)


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