TY - JOUR
T1 - Electronic signatures of topological disorder in amorphous graphene
AU - Li, Yuting
AU - Drabold, David A.
N1 - Publisher Copyright:
© The Institution of Engineering and Technology 2015.
PY - 2015/1/1
Y1 - 2015/1/1
N2 - There have been extensive studies of the many phases of carbon, involving diamond and graphite, fullerenes, carbon nanotubes, amorphous carbon [1-3] and Schwarzites. In this study, the authors explore the impact of topological disorder (oddmembered rings) on the electron localisation of amorphous graphene. The authors employ realistic structural models, and find that the electronic states around Fermi level are highly localised around odd-membered rings. They predict an scanning tunnelling microscopic image for the amorphous surface. The authors' results also suggest that for two-dimensional system, there exist highly localised states well above the Fermi energy not at a band edge, which is rare in three-dimensional system. Phonon calculations reveal that certain atoms in the network are involved in both localised electronic and localised vibrational states, leading us to expect a large electron-phonon coupling between these, which might have interesting observable consequences.
AB - There have been extensive studies of the many phases of carbon, involving diamond and graphite, fullerenes, carbon nanotubes, amorphous carbon [1-3] and Schwarzites. In this study, the authors explore the impact of topological disorder (oddmembered rings) on the electron localisation of amorphous graphene. The authors employ realistic structural models, and find that the electronic states around Fermi level are highly localised around odd-membered rings. They predict an scanning tunnelling microscopic image for the amorphous surface. The authors' results also suggest that for two-dimensional system, there exist highly localised states well above the Fermi energy not at a band edge, which is rare in three-dimensional system. Phonon calculations reveal that certain atoms in the network are involved in both localised electronic and localised vibrational states, leading us to expect a large electron-phonon coupling between these, which might have interesting observable consequences.
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U2 - 10.1049/iet-cds.2014.0034
DO - 10.1049/iet-cds.2014.0034
M3 - Article
AN - SCOPUS:84923029125
SN - 1751-858X
VL - 9
SP - 13
EP - 18
JO - IET Circuits, Devices and Systems
JF - IET Circuits, Devices and Systems
IS - 1
ER -