Breakdown of Zero-Energy Quantum Hall State in Graphene in the Light of Current Fluctuations and Shot Noise

Antti Laitinen*, Manohar Kumar, Teemu Elo, Ying Liu, T. S. Abhilash, Pertti J. Hakonen

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

1 Citation (Scopus)
104 Downloads (Pure)

Abstract

We have investigated the cross-over from Zener tunneling of single charge carriers to avalanche type of bunched electron transport in a suspended graphene Corbino disk in the zeroth Landau level. At low bias, we find a tunneling current that follows the gyrotropic Zener tunneling behavior. At larger bias, we find an avalanche type of transport that sets in at a smaller current the larger the magnetic field is. The low-frequency noise indicates strong bunching of the electrons in the avalanches. On the basis of the measured low-frequency switching noise power, we deduce the characteristic switching rates of the avalanche sequence. The simultaneous microwave shot noise measurement also reveals intrinsic correlations within the avalanche pulses and indicate a decrease in correlations with increasing bias.

Original languageEnglish
Pages (from-to)272–287
Number of pages16
JournalJournal of Low Temperature Physics
Volume191
Issue number5-6
DOIs
Publication statusPublished - 2018
MoE publication typeA1 Journal article-refereed

Keywords

  • Dielectric breakdown
  • Graphene
  • Quantum Hall
  • Shot noise

Fingerprint Dive into the research topics of 'Breakdown of Zero-Energy Quantum Hall State in Graphene in the Light of Current Fluctuations and Shot Noise'. Together they form a unique fingerprint.

  • Projects

    Equipment

    OtaNano

    Anna Rissanen (Manager)

    Aalto University

    Facility/equipment: Facility

  • Cite this