Planar and van der Waals heterostructures for vertical tunnelling single electron transistors

Research output: Contribution to journalArticle

  • External authors:
  • Gwangwoo Kim
  • Sung-Soo Kim
  • Jonghyuk Jeon
  • Seong In Yoon
  • Seokmo Hong
  • Young Jin Cho
  • Abhishek Misra
  • Jun Yin
  • Matthew Holwill
  • Davit Ghazaryan
  • Daria V. Andreeva
  • Yong-Jin Kim
  • Hu Young Jeong
  • A-Rang Jang
  • Hyun-Jong Chung
  • Andre Geim
  • Konstantin Novoselov
  • Byeong-Hyeok Sohn
  • Hyeon Suk Shin

Abstract

Despite a rich choice of two-dimensional materials, which exists these days, heterostructures,both vertical (van der Waals) and in-plane, offer an unprecedented control overthe properties and functionalities of the resulted structures. Thus, planar heterostructures allow p-n junctions between different two-dimensional semiconductors and graphene nanoribbons with well-defined edges; and vertical heterostructures resulted in the observation of superconductivity in purely carbon-based systems and realisation of vertical tunnelling transistors. Here we demonstrate simultaneous use of in-plane and van der Waals heterostructures to build vertical single electron tunnelling transistors. We grow graphene quantum dots inside the matrix of hexagonal boron nitride, which allows a dramatic reduction of the number of localised states along the perimeter of the quantum dots. The use of hexagonal
boron nitride tunnel barriers as contacts to the graphene quantum dots make our transistors reproducible and not dependent on the localised states, opening even larger flexibility when designing future devices.

Bibliographical metadata

Original languageEnglish
JournalNature Communications
Volume10
DOIs
Publication statusPublished - 16 Jan 2019