Conductance Spectra in Graphene-Superconductor Junctions. (1st January 2015)

• Record Type: Journal Article
• Authors: Tian, Jie; Zhou, Shi-Ping; Deng, Zhen-Yan
• Is Part Of: Communications in theoretical physics. Volume 63:Number 1(2015:Jan.)
• Page Start: 109
• Page End: 114
• Publication Date: 2015-01-01
• Subjects: Physics -- Periodicals; 530.105
• DOI: 10.1088/0253-6102/63/1/17
• Languages: English
• ISSNs: 0253-6102

Abstract

<abstract xml:lang="en"> <title>Abstract</title> <p>The conductance spectra of a graphene ribbon and graphene-superconductor (G-S) junctions are investigated, using the tight-binding model and non-equilibrium Green' function formalism. It is found that the quantized conductance related to graphene' edge-states is robust against perturbations in the model parameters for a graphene monolayer ribbon with the zigzag boundary. With appropriate model parameter of the spin-orbit interaction strength, a new bound state with odd-frequency symmetry is found in the G-S junction. An enhancement in the zero-energy conductance amplitude is followed.</p> </abstract>