Band-selective filter in a zigzag graphene nanoribbon

Jun Nakabayashi*, Daisuke Yamamoto, Susumu Kurihara

*この研究の対応する著者

研究成果: Article査読

112 被引用数 (Scopus)

抄録

Electric transport of a zigzag graphene nanoribbon through a steplike potential and a barrier potential is investigated by using the recursive Green's function method. In the case of the steplike potential, we demonstrate numerically that scattering processes obey a selection rule for the band indices when the number of zigzag chains is even; the electrons belonging to the "even" ("odd") bands are scattered only into the even (odd) bands so that the parity of the wave functions is preserved. In the case of the barrier potential, by tuning the barrier height to be an appropriate value, we show that it can work as the "band-selective filter", which transmits electrons selectively with respect to the indices of the bands to which the incident electrons belong. Finally, we suggest that this selection rule can be observed in the conductance by applying two barrier potentials.

本文言語English
論文番号066803
ジャーナルPhysical Review Letters
102
6
DOI
出版ステータスPublished - 2009 2月 10

ASJC Scopus subject areas

  • 物理学および天文学(全般)

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