Volume 17, Issue 3 ((Iranian Journal of Physics Research,summer 2017)                   IJPR 2017, 17(3): 485-489 | Back to browse issues page

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Khatami H, Moomivand E, Abdollahipour B, Mohammadkhani R. Tunneling conductance in a graphene-insulator-superconductor junction with Corbino disk structure. . IJPR. 2017; 17 (3) :485-489
URL: http://ijpr.iut.ac.ir/article-1-2033-en.html
University of Zanjan , rmkhani@znu.ac.ir
Abstract:   (2349 Views)

We study tunneling conductance of a graphene based normal metal-insulator-superconductor (NIS) junction with Corbino disk structure. Solving Dirac-Bogolioubov- De Gennes (DBdG) equation in different regions of the junction and employing scattering approach we obtain normal and Andreev reflection coefficients of the junction. Using Blonder-Tinkham-Klapwijk (BTK) formula we calculate tunneling conductance of the junction as a function of the barrier strength of insulating region. The obtained results show that tunneling conductance of the junction oscillates as a function of the barrier strength as in the planar structure case. The tunneling conductance shows maximums at resonances which have a pi/2  phase shift with respect to the planar structure.

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Type of Study: Research | Subject: General

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