کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1808212 | 1525149 | 2016 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Novel Ï-type vortex in a nanoscale extreme type-II superconductor: Induced by quantum-size effect
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موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
فیزیک ماده چگال
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
By numerically solving the Bogoliubov-de Gennes equations, we report a novel Ï-type vortex state whose order parameter near the core undergoes an extraordinary Ï-phase change for a quantum-confined extreme type-II s-wave superconductor. Its supercurrent behaves as the cube of the radial coordinate near the core, and its local density of states spectrum exhibits a significant negative-shifted zero-bias peak. Such Ï-type vortex state is induced by quantum-size effect, and can survive thermal smearing at temperatures up to a critical value TÏ. The Anderson's approximation indicates that the Ï-type vortex may remain stable under sufficiently week magnetic field in the case less deep in the type-II limit. Moreover, we find that its appearance is governed by the sample size and kFξ0 with kF the Fermi wave number and ξ0 the zero-temperature coherence length. Similar effects may be expected in quantum-confined ultracold superfluid Fermi gasses, or even high-Tc superconductors with proper kFξ0 value.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physica B: Condensed Matter - Volume 500, 1 November 2016, Pages 53-58
Journal: Physica B: Condensed Matter - Volume 500, 1 November 2016, Pages 53-58
نویسندگان
Haiyan Huang, Qing Liu, Wenhui Zhang, Yajiang Chen,