کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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1594060 | 1515653 | 2010 | 4 صفحه PDF | دانلود رایگان |

The electronic structures and the persistent currents of diamond-like graphene rings (DGRs) are investigated within the tight-binding formalism. The calculations show that an armchair DGR is a metallic ring only at selected ring width N=3m−1N=3m−1 (mm is an integer), while a zigzag one appears to be metallic regardless of its geometry. The persistent currents in DGRs are calculated, depending strongly on their geometries. It is found that the persistent current in a metallic armchair DGR is near an order of magnitude larger than that in a metallic zigzag hexagonal graphene ring (HGR) of equivalent size [M.M. Ma, J.W. Ding, N. Xu, Nanoscale 1 (2009) 387]. In the metallic zigzag DGRs, the persistent currents are declined generally by two orders of magnitude compared with the sizable metallic armchair DGRs.
Journal: Solid State Communications - Volume 150, Issues 27–28, July 2010, Pages 1196–1199