Coulomb blockade in a granular material made of gold nanowires

Hoel Guerin, Masanori Yoshihira, Hiroaki Kura, Tomoyuki Ogawa, Tetsuya Sato, Hideyuki Maki

研究成果: Conference contribution

1 被引用数 (Scopus)

抄録

Uniform, 2 nm diameter gold nanowires were synthesized through the reduction of gold(III) chloride in an oleylamine matrix. They were top-contacted on a Si/SiO2 substrate with metallic electrodes to manufacture back-gated transistors. Due to thermal breakage, the gold nanowires were fragmented into a granular material and the non-linear current-bias voltage characteristics measured on the devices from 7 K up to 300 K were described by the Coulomb blockade theory in a nearly one-dimensional quantum dot array. The electronic transport was governed by sequential tunneling at an applied bias above the global Coulomb blockade threshold, whereas in the Coulomb blockade regime, inelastic cotunneling was dominant up to 70 K, at which point it crossed over to activated behavior. The current dependence on the gate voltage that showed irregular oscillations was explained by the superimposition of Coulomb oscillation patterns generated by each different dot in the one-dimensional array. The competitive effects of excitation energy and stochastic Coulomb blockade balanced the number of current peaks observed.

本文言語English
ホスト出版物のタイトル2012 12th IEEE International Conference on Nanotechnology, NANO 2012
DOI
出版ステータスPublished - 2012 11 22
イベント2012 12th IEEE International Conference on Nanotechnology, NANO 2012 - Birmingham, United Kingdom
継続期間: 2012 8 202012 8 23

出版物シリーズ

名前Proceedings of the IEEE Conference on Nanotechnology
ISSN(印刷版)1944-9399
ISSN(電子版)1944-9380

Other

Other2012 12th IEEE International Conference on Nanotechnology, NANO 2012
CountryUnited Kingdom
CityBirmingham
Period12/8/2012/8/23

ASJC Scopus subject areas

  • Bioengineering
  • Electrical and Electronic Engineering
  • Materials Chemistry
  • Condensed Matter Physics

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