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

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Journal Title
Journal ISSN
Volume Title
A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Date
2018
Major/Subject
Mcode
Degree programme
Language
en
Pages
16
272–287
Series
Journal of Low Temperature Physics, Volume 191, issue 5-6
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.
Description
| openaire: EC/H2020/670743/EU//QuDeT
Keywords
Dielectric breakdown, Graphene, Quantum Hall, Shot noise
Other note
Citation
Laitinen , A , Kumar , M , Elo , T , Liu , Y , Abhilash , T S & Hakonen , P J 2018 , ' Breakdown of Zero-Energy Quantum Hall State in Graphene in the Light of Current Fluctuations and Shot Noise ' , Journal of Low Temperature Physics , vol. 191 , no. 5-6 , pp. 272–287 . https://doi.org/10.1007/s10909-018-1855-x