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

Research output: Contribution to journalArticleScientificpeer-review

1 Citation (Scopus)

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 - 1 Jun 2018
MoE publication typeA1 Journal article-refereed

Fingerprint

Shot noise
Graphite
Switching frequency
shot noise
Charge carriers
avalanches
Graphene
graphene
breakdown
Microwaves
Magnetic fields
Electrons
energy
low frequencies
bunching
noise measurement
charge carriers
electrons
Electron Transport
microwaves

Keywords

  • Dielectric breakdown
  • Graphene
  • Quantum Hall
  • Shot noise

Cite this

Laitinen, Antti ; Kumar, Manohar ; Elo, Teemu ; Liu, Ying ; Abhilash, T. S. ; Hakonen, Pertti J. / Breakdown of Zero-Energy Quantum Hall State in Graphene in the Light of Current Fluctuations and Shot Noise. In: Journal of Low Temperature Physics. 2018 ; Vol. 191, No. 5-6. pp. 272-287.
@article{90e9c0be5fd040469d82036df53ccd87,
title = "Breakdown of Zero-Energy Quantum Hall State in Graphene in the Light of Current Fluctuations and Shot Noise",
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.",
keywords = "Dielectric breakdown, Graphene, Quantum Hall, Shot noise",
author = "Antti Laitinen and Manohar Kumar and Teemu Elo and Ying Liu and Abhilash, {T. S.} and Hakonen, {Pertti J.}",
year = "2018",
month = "6",
day = "1",
doi = "10.1007/s10909-018-1855-x",
language = "English",
volume = "191",
pages = "272--287",
journal = "Journal of Low Temperature Physics",
issn = "0022-2291",
publisher = "Springer",
number = "5-6",

}

Breakdown of Zero-Energy Quantum Hall State in Graphene in the Light of Current Fluctuations and Shot Noise. / Laitinen, Antti; Kumar, Manohar; Elo, Teemu; Liu, Ying; Abhilash, T. S.; Hakonen, Pertti J.

In: Journal of Low Temperature Physics, Vol. 191, No. 5-6, 01.06.2018, p. 272-287.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Breakdown of Zero-Energy Quantum Hall State in Graphene in the Light of Current Fluctuations and Shot Noise

AU - Laitinen, Antti

AU - Kumar, Manohar

AU - Elo, Teemu

AU - Liu, Ying

AU - Abhilash, T. S.

AU - Hakonen, Pertti J.

PY - 2018/6/1

Y1 - 2018/6/1

N2 - 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.

AB - 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.

KW - Dielectric breakdown

KW - Graphene

KW - Quantum Hall

KW - Shot noise

UR - http://www.scopus.com/inward/record.url?scp=85041210317&partnerID=8YFLogxK

U2 - 10.1007/s10909-018-1855-x

DO - 10.1007/s10909-018-1855-x

M3 - Article

AN - SCOPUS:85041210317

VL - 191

SP - 272

EP - 287

JO - Journal of Low Temperature Physics

JF - Journal of Low Temperature Physics

SN - 0022-2291

IS - 5-6

ER -