کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1813632 1025638 2009 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Quantum spin Hall phase in neutral zigzag graphene ribbons
موضوعات مرتبط
مهندسی و علوم پایه فیزیک و نجوم فیزیک ماده چگال
پیش نمایش صفحه اول مقاله
Quantum spin Hall phase in neutral zigzag graphene ribbons
چکیده انگلیسی

We present a detailed description of the nature of the wavefunction and spin distribution of the zero energy modes of zigzag graphene ribbons (ZGRs) in the presence of the intrinsic spin–orbit (I-SO) interaction. These states characterize the quantum spin Hall (QSH) phase in graphene ribbons. We provide analytic expressions for wavefunctions and show how these evolve as the strength of the interaction and the ribbon width are changed. For odd-width ribbons, we show that its insulating nature precludes the existence of a QSH phase. For these systems the I-SO interaction is predicted to have a stronger effect as shown by the enhancement of the gap as the interaction strength is turned on.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physica B: Condensed Matter - Volume 404, Issue 18, 1 October 2009, Pages 2694–2698
نویسندگان
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