Band Structures And Transport Properties Of Zigzag Graphene Nanoribbons With Antidot Arrays

In this paper, band structures and electronic transport properties of zigzag graphenenanoribbons with antidot arrays were calculated through tight-banding model andLandau-Buttiker formula.It is found that an antidot lattice could turn semimetal graphene into a semicoundor. Thesize of the band gap can be tuned by the position of the antidots and the distance D betweenthe two nearest antidots. For a finite superlattice with N antidots and a large D, a group of (N. 1)splitting resonant peaks and transmission-blockade regions appear alternately in theconductance spectrum. This indicates the formation of minibands and minigaps. In addition,Fano resonances can be observed when the antidots are localized near one edge of thenanoribbon. These features provide potential applications for graphene-based electronic andoptoelectronic devices.On basis of antidots supperlattic,the conductance is influence by ferromegnetic ingraphene nanoribbons. Electronic spin is decoupling due to considing ferromegnetic. A groupof splitting resonant peaks and transmission-blockade regions appear because antidotssupperlattic.When splitting resonant peaks with spin-up and spin-down appearalternately,there is spin flip effect.