کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1594060 1515653 2010 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Geometry dependence of persistent currents in diamond-like graphene rings
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد دانش مواد (عمومی)
پیش نمایش صفحه اول مقاله
Geometry dependence of persistent currents in diamond-like graphene rings
چکیده انگلیسی

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.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Solid State Communications - Volume 150, Issues 27–28, July 2010, Pages 1196–1199
نویسندگان
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