Physics – Condensed Matter – Mesoscale and Nanoscale Physics
Scientific paper
2011-03-24
APPLIED PHYSICS LETTERS 97, 252102 (2010)
Physics
Condensed Matter
Mesoscale and Nanoscale Physics
Scientific paper
10.1063/1.3527979
Negative differential conductance and tunneling characteristics of two-terminal graphene devices are observed before and after electric breakdown, respectively. The former is caused by the strong scattering under a high E-field, and the latter is due to the appearance of a tunneling barrier in graphene channel induced by a structural transformation from crystalline graphene to disordered graphene because of the breakdown. Using Raman spectroscopy and imaging, the presence of non-uniform disordered graphene is confirmed. A memory switching effect of 100000% ON/OFF ratio is demonstrated in the tunneling regime which can be employed in various applications.
Bhatia Charanjit S.
Kalon Gopinadhan
Kwon Jae Hyun
Liang Gengchiau
Niu Jing
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