Magnetic response of conductance peak structure in junction-confined graphene nanoribbons

被引：2

作者：

Yamamoto, Masayuki ^{[1
]}

Wakabayashi, Katsunori ^{[1
,2
]}

机构：

[1] Natl Inst Mat Sci NIMS, Int Ctr Mat Nanoarchitecton MANA, Tsukuba, Ibaraki 3050044, Japan

[2] Japan Sci & Technol Agcy JST, PRESTO, Kawaguchi, Saitama 3320012, Japan

来源：

NANOSCALE | 2012年 / 4卷 / 04期

关键词：

CARBON NANOTUBES; NANOGRAPHITE RIBBONS; ZIGZAG; EDGE; TRANSPORT; GRAPHITE; STATES;

D O I：

10.1039/c1nr11056j

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

We have numerically investigated the magnetic response of the conductance peak structures in the transport gap of graphene nanoribbons. It is shown that the magnetic field induces a number of new conductance peaks within the transport gap of graphene nanoribbons confined by structural junctions. In addition, the magnetic field causes a shift of the conductance peak position and broadening of the peak width. This behaviour is due to the disappearance of zero conductance dips at the junction as a result of breaking time-reversal symmetry. Such behaviour is, however, not observed in the electronic transport of graphene nanoribbons confined by potential barriers, i.e. p-n-junctions. Thus, the magnetic response of conductance peaks may be used to distinguish the origin of the conductance peak structure within the transport gap observed in the experiments.

引用

页码：1138 / 1145

页数：8

共 9 条

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