Experimental evidence for Efros-Shklovskii variable range hopping in hydrogenated graphene

Chiashain Chuang; R. K. Puddy; Huang De Lin; Shun Tsung Lo; T. M. Chen; C. G. Smith; C. T. Liang

doi:10.1016/j.ssc.2012.02.002

Experimental evidence for Efros-Shklovskii variable range hopping in hydrogenated graphene

Chiashain Chuang, R. K. Puddy, Huang De Lin, Shun Tsung Lo, T. M. Chen, C. G. Smith, C. T. Liang

Department of Physics

Research output: Contribution to journal › Article › peer-review

49 Citations (Scopus)

Abstract

We have performed transport measurements on a hydrogenated graphene flake. It is found that conventional analysis cannot allow us to determine whether Mott variable range hopping (VRH) or Efros-Shklovskii (ES) VRH is the dominant mechanism in our system. By employing the modified resistance curve derivative analysis (RCDA) method, we are able to unequivocally show that ES VRH dominates and thus Coulomb interaction effects exist in our system at zero magnetic field. Transport data obtained in the intermediate and high field regimes also follow ES VRH based on the RCDA method. Our results suggest that Coulomb interaction effects can play an important role in disordered graphene.

Original language	English
Pages (from-to)	905-908
Number of pages	4
Journal	Solid State Communications
Volume	152
Issue number	10
DOIs	https://doi.org/10.1016/j.ssc.2012.02.002
Publication status	Published - 2012 May

All Science Journal Classification (ASJC) codes

General Chemistry
Condensed Matter Physics
Materials Chemistry

Access to Document

10.1016/j.ssc.2012.02.002

Cite this

@article{816cb2fe0f314e75a2377e3db1e5be7b,

title = "Experimental evidence for Efros-Shklovskii variable range hopping in hydrogenated graphene",

abstract = "We have performed transport measurements on a hydrogenated graphene flake. It is found that conventional analysis cannot allow us to determine whether Mott variable range hopping (VRH) or Efros-Shklovskii (ES) VRH is the dominant mechanism in our system. By employing the modified resistance curve derivative analysis (RCDA) method, we are able to unequivocally show that ES VRH dominates and thus Coulomb interaction effects exist in our system at zero magnetic field. Transport data obtained in the intermediate and high field regimes also follow ES VRH based on the RCDA method. Our results suggest that Coulomb interaction effects can play an important role in disordered graphene.",

author = "Chiashain Chuang and Puddy, {R. K.} and Lin, {Huang De} and Lo, {Shun Tsung} and Chen, {T. M.} and Smith, {C. G.} and Liang, {C. T.}",

note = "Funding Information: This work was funded by the National Science Council (NSC), Taiwan (grant no: NSC 99-2911-I-002-126 ). C.T.L. thanks Tina Liang, Valen Liang, and Eva Liang for their support.",

year = "2012",

month = may,

doi = "10.1016/j.ssc.2012.02.002",

language = "English",

volume = "152",

pages = "905--908",

journal = "Solid State Communications",

issn = "0038-1098",

publisher = "Elsevier Limited",

number = "10",

}

TY - JOUR

T1 - Experimental evidence for Efros-Shklovskii variable range hopping in hydrogenated graphene

AU - Chuang, Chiashain

AU - Puddy, R. K.

AU - Lin, Huang De

AU - Lo, Shun Tsung

AU - Chen, T. M.

AU - Smith, C. G.

AU - Liang, C. T.

N1 - Funding Information: This work was funded by the National Science Council (NSC), Taiwan (grant no: NSC 99-2911-I-002-126 ). C.T.L. thanks Tina Liang, Valen Liang, and Eva Liang for their support.

PY - 2012/5

Y1 - 2012/5

N2 - We have performed transport measurements on a hydrogenated graphene flake. It is found that conventional analysis cannot allow us to determine whether Mott variable range hopping (VRH) or Efros-Shklovskii (ES) VRH is the dominant mechanism in our system. By employing the modified resistance curve derivative analysis (RCDA) method, we are able to unequivocally show that ES VRH dominates and thus Coulomb interaction effects exist in our system at zero magnetic field. Transport data obtained in the intermediate and high field regimes also follow ES VRH based on the RCDA method. Our results suggest that Coulomb interaction effects can play an important role in disordered graphene.

AB - We have performed transport measurements on a hydrogenated graphene flake. It is found that conventional analysis cannot allow us to determine whether Mott variable range hopping (VRH) or Efros-Shklovskii (ES) VRH is the dominant mechanism in our system. By employing the modified resistance curve derivative analysis (RCDA) method, we are able to unequivocally show that ES VRH dominates and thus Coulomb interaction effects exist in our system at zero magnetic field. Transport data obtained in the intermediate and high field regimes also follow ES VRH based on the RCDA method. Our results suggest that Coulomb interaction effects can play an important role in disordered graphene.

UR - http://www.scopus.com/inward/record.url?scp=84862790009&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84862790009&partnerID=8YFLogxK

U2 - 10.1016/j.ssc.2012.02.002

DO - 10.1016/j.ssc.2012.02.002

M3 - Article

AN - SCOPUS:84862790009

SN - 0038-1098

VL - 152

SP - 905

EP - 908

JO - Solid State Communications

JF - Solid State Communications

IS - 10

ER -

Experimental evidence for Efros-Shklovskii variable range hopping in hydrogenated graphene

Abstract

All Science Journal Classification (ASJC) codes

Access to Document

Other files and links

Fingerprint

Cite this