Coulomb Blockade and Hopping Conduction in Graphene Quantum Dots Array

Daeha Joung; Lei Zhai; Saiful I. Khondaker

doi:10.1103/PhysRevB.83.115323

Coulomb Blockade and Hopping Conduction in Graphene Quantum Dots Array

Mesoscale and Nanoscale Physics 2015-05-20 v2

Authors: Daeha Joung , Lei Zhai , Saiful I. Khondaker

View on arXiv ↗ PDF ↗ DOI ↗

Abstract

We show that the low temperature electron transport properties of chemically functionalized graphene can be explained as sequential tunneling of charges through a two dimensional array of graphene quantum dots (GQD). Below 15 K, a total suppression of current due to Coulomb blockade through GQD array was observed. Temperature dependent current-gate voltage characteristics show Coulomb oscillations with energy scales of 6.2-10 meV corresponding to GQD sizes of 5-8 nm while resistance data exhibit an Efros-Shklovskii variable range hopping arising from structural and size induced disorder.

Keywords

graphene electronic transport coulomb interaction charge carrier mobility

Cite

@article{arxiv.1010.5306,
  title  = {Coulomb Blockade and Hopping Conduction in Graphene Quantum Dots Array},
  author = {Daeha Joung and Lei Zhai and Saiful I. Khondaker},
  journal= {arXiv preprint arXiv:1010.5306},
  year   = {2015}
}

Comments

The document will be appeared in Physics Review B

Coulomb Blockade and Hopping Conduction in Graphene Quantum Dots Array

Abstract

Keywords

Cite

Comments

Related papers