کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10129004 | 1645163 | 2019 | 21 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Magnetic and thermal characteristics of armchair graphene nanoribbons in the two-band Harrison model
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
فیزیک ماده چگال
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
In this study, within a two-band tight-binding Harrison Hamiltonian and the Green's function approach, the influences of both localized Ï and delocalized Ï electrons on the Pauli paramagnetic susceptibility, heat capacity and density of states of armchair graphene nanoribbons with different widths are investigated. Temperature dependence of the paramagnetic susceptibility and electronic heat capacity are compared for s and p orbitals of every width. In the density of states, an extension in the bandwidth and the extra number of Van-Hove singularities are observed. More importantly, a paramagnetic behavior associated with the Ï electrons could take place. Finally, a Schottky anomaly for the heat capacity is reported. Overall, in this paper, it was observed that both the Ï and the Ï electrons contribute significantly to the aforementioned quantities.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Magnetism and Magnetic Materials - Volume 469, 1 January 2019, Pages 405-410
Journal: Journal of Magnetism and Magnetic Materials - Volume 469, 1 January 2019, Pages 405-410
نویسندگان
Hamze Mousavi, Samira Jalilvand, Fereshteh Mirzaei,