Open AccessThe effect of stacked graphene flakes on the electronic transport of zigzag-edged graphene nanoribbons
Author(s) -
Mi Zhang,
Yuanping Chen,
Zhang Zai-Lan,
Tao Ouyang,
Jianxin Zhong
Publication year - 2011
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.60.127204
Subject(s) - zigzag , fermi level , graphene , conductance , graphene nanoribbons , condensed matter physics , materials science , fermi energy , fermi gamma ray space telescope , physics , nanotechnology , electron , quantum mechanics , geometry , mathematics
The effect of stacked graphene flakes (GFs) on the electronic transport property of zigzag-edged graphene nanoribbon (ZGNR) is investigated. By using the Greens function method, we calculate the conductances of ZGNRs with two different stacked-type GFs. It is found that the coupling effect between ZGNRs and GFs can induce dips at the conductance profiles in two different stacked-types. For both stacked-types, the dips far away from the Fermi level are nearly overlapped. However, the position of conductance dip near the Fermi level depends on the stacked-type. In addition, we discuss the effect of geometric size of GF on the electronic transport property. The results show that with the increase of the size of GF, the dips far away the Fermi level in two stacked-types gradually move toward the Fermi level, while the discrepancy of the dips near the Fermi level is much evident. Our results indicate that the stacked GFs can effectively tune the electronic transport of ZGNR.