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Electron-Hole Symmetry Breaking in Charge Transport in Nitrogen-Doped Graphene

Li, Jiayu; Lin, Li; Rui, Dingran; Li, Qiucheng; Zhang, Jincan; Kang, Ning; Zhang, Yanfeng; Peng, Hailin; Liu, Zhongfan and Xu, H. Q. LU (2017) In ACS Nano 11(5). p.4641-4650
Abstract

Graphitic nitrogen-doped graphene is an excellent platform to study scattering processes of massless Dirac Fermions by charged impurities, in which high mobility can be preserved due to the absence of lattice defects through direct substitution of carbon atoms in the graphene lattice by nitrogen atoms. In this work, we report on electrical and magnetotransport measurements of high-quality graphitic nitrogen-doped graphene. We show that the substitutional nitrogen dopants in graphene introduce atomically sharp scatters for electrons but long-range Coulomb scatters for holes and, thus, graphitic nitrogen-doped graphene exhibits clear electron-hole asymmetry in transport properties. Dominant scattering processes of charge carriers in... (More)

Graphitic nitrogen-doped graphene is an excellent platform to study scattering processes of massless Dirac Fermions by charged impurities, in which high mobility can be preserved due to the absence of lattice defects through direct substitution of carbon atoms in the graphene lattice by nitrogen atoms. In this work, we report on electrical and magnetotransport measurements of high-quality graphitic nitrogen-doped graphene. We show that the substitutional nitrogen dopants in graphene introduce atomically sharp scatters for electrons but long-range Coulomb scatters for holes and, thus, graphitic nitrogen-doped graphene exhibits clear electron-hole asymmetry in transport properties. Dominant scattering processes of charge carriers in graphitic nitrogen-doped graphene are analyzed. It is shown that the electron-hole asymmetry originates from a distinct difference in intervalley scattering of electrons and holes. We have also carried out the magnetotransport measurements of graphitic nitrogen-doped graphene at different temperatures and the temperature dependences of intervalley scattering, intravalley scattering, and phase coherent scattering rates are extracted and discussed. Our results provide an evidence for the electron-hole asymmetry in the intervalley scattering induced by substitutional nitrogen dopants in graphene and shine a light on versatile and potential applications of graphitic nitrogen-doped graphene in electronic and valleytronic devices.

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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
atomically sharp scattering center, charge transport, graphene, graphitic nitrogen doping, intervalley scattering
in
ACS Nano
volume
11
issue
5
pages
10 pages
publisher
The American Chemical Society
external identifiers
  • scopus:85019857463
  • wos:000402498400029
ISSN
1936-0851
DOI
10.1021/acsnano.7b00313
language
English
LU publication?
yes
id
30f8d30f-103d-4396-aac2-409343863378
date added to LUP
2017-06-14 14:26:43
date last changed
2017-09-18 11:41:13
@article{30f8d30f-103d-4396-aac2-409343863378,
  abstract     = {<p>Graphitic nitrogen-doped graphene is an excellent platform to study scattering processes of massless Dirac Fermions by charged impurities, in which high mobility can be preserved due to the absence of lattice defects through direct substitution of carbon atoms in the graphene lattice by nitrogen atoms. In this work, we report on electrical and magnetotransport measurements of high-quality graphitic nitrogen-doped graphene. We show that the substitutional nitrogen dopants in graphene introduce atomically sharp scatters for electrons but long-range Coulomb scatters for holes and, thus, graphitic nitrogen-doped graphene exhibits clear electron-hole asymmetry in transport properties. Dominant scattering processes of charge carriers in graphitic nitrogen-doped graphene are analyzed. It is shown that the electron-hole asymmetry originates from a distinct difference in intervalley scattering of electrons and holes. We have also carried out the magnetotransport measurements of graphitic nitrogen-doped graphene at different temperatures and the temperature dependences of intervalley scattering, intravalley scattering, and phase coherent scattering rates are extracted and discussed. Our results provide an evidence for the electron-hole asymmetry in the intervalley scattering induced by substitutional nitrogen dopants in graphene and shine a light on versatile and potential applications of graphitic nitrogen-doped graphene in electronic and valleytronic devices.</p>},
  author       = {Li, Jiayu and Lin, Li and Rui, Dingran and Li, Qiucheng and Zhang, Jincan and Kang, Ning and Zhang, Yanfeng and Peng, Hailin and Liu, Zhongfan and Xu, H. Q.},
  issn         = {1936-0851},
  keyword      = {atomically sharp scattering center,charge transport,graphene,graphitic nitrogen doping,intervalley scattering},
  language     = {eng},
  month        = {05},
  number       = {5},
  pages        = {4641--4650},
  publisher    = {The American Chemical Society},
  series       = {ACS Nano},
  title        = {Electron-Hole Symmetry Breaking in Charge Transport in Nitrogen-Doped Graphene},
  url          = {http://dx.doi.org/10.1021/acsnano.7b00313},
  volume       = {11},
  year         = {2017},
}