کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1820231 | 1525768 | 2008 | 4 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Tunneling spectroscopy of giant vorticity states in superconducting micro- and nanorings at ultra-low temperatures
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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
When a superconducting contour is exposed to a magnetic field screening currents are induced. At temperatures well below the critical temperature Tc periodicity of the persistent currents can significantly exceed the superconducting flux quantum h/2e due to formation of metastable energy states with high quantum winding numbers (vorticity). We have studied the effect in normal metal-insulator-superconductor (NIS) and SIS'IS tunnel structures with the superconducting (S or Sâ²) electrode in a shape of a loop. The tunnel current oscillates due to the modulation of the superconducting density of states by the persistent currents reaching the sub-critical values. In the limit of loops with extremely narrow linewidth the magnitude of the oscillations drops and their shape deviates from the 'conventional' saw-tooth behavior. The effect can be accounted to the contribution of the quantum phase slips in the ultra-narrow superconducting ring-shaped electrode.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physica C: Superconductivity and its Applications - Volume 468, Issues 7â10, 1 April 2008, Pages 733-736
Journal: Physica C: Superconductivity and its Applications - Volume 468, Issues 7â10, 1 April 2008, Pages 733-736
نویسندگان
T.T. Hongisto, K.Yu. Arutyunov,