Observation of single-electron transport in a Zn0.8Mg 0.2O/ZnO coaxial heterostructure nanorod

Dongchan Jeong, Dong Keun Ki, Myung Ho Bae, Hu Jong Lee, Chul Ho Lee, Jinkyoung Yoo, Gyu Chul Yi

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

Coaxial Zn0.8Mg0.2O/ZnO hetrostructure semiconducting nanorods with different band gaps were fabricated on oxide-layer-covered Si substrates by using catalyst-free metal-organic vapor-phase epitaxy. The electrical conduction of nanorods with Ti/Au Schottky-contact electrodes, taken at various temperatures down to 50 mK, revealed a Coulomb-blockade behavior, pointing a multiple quantum-dot structure existing in the ZnO nanorod core or in the Zn0.8Mg0.2O cylindrical shell over a wide range of gate voltages. These characteristics, transformed into single-dot ones at high positive gate voltages. This study confirms, by electrical conduction measurements, the formation of a coaxial heterojunction structure between materials of two different band gaps and provides a possibility for utilizing the structure for three-terminal device applications.

Original languageEnglish
Pages (from-to)962-966
Number of pages5
JournalJournal of the Korean Physical Society
Volume53
Issue number2 PART 1
DOIs
Publication statusPublished - 2008 Aug

Keywords

  • Coaxial heterojunction nanorod
  • Coulomb diamond
  • Quantum dot

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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