QUANTUM TRANSPORT IN GRAPHEME NORMAL-METAL SUPERCONDUCTOR- NORMAL-METAL STRUCTURES

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MOHAMMADPOUR H.; ZAREIAN M.

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ISSN: 2588-4824

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Journal: Iranian Journal of Physics Research Year:2008 | Volume:8 | Issue:2 Page(s): 81-86

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Title

QUANTUM TRANSPORT IN GRAPHEME NORMAL-METAL SUPERCONDUCTOR- NORMAL-METAL STRUCTURES

Author(s)

MOHAMMADPOUR H. | ZAREIAN M. | Issue Writer Certificate

Keywords

GRAPHENEQ3

QUANTUM TRANSPORTQ3

SUPERCONDUCTING PROXIMITYQ3

KLEIN TUNNELINGQ3

ANDREEV REFLECTIONQ3

Abstract

We study the transport of electrons in a GRAPHENE NSN structure in which two normal regions are connected by a superconducting strip of thickness d. Within Dirac-Bogoliubov-de Gennes equations we describe the transmission through the contact in terms of different scattering processes consisting of quasiparticle cotunneling, local and crossed ANDREEV REFLECTIONs. Compared to a fully normal structure we show that the angular dependence of the transmission probability is significantly modified by the presence of superconducting correlations. This modifation can be explained in terms of the interplay between ANDREEV REFLECTION and KLEIN TUNNELING of chiral quasiparticles. We further analyze the energy dependence of the resulting differential conductance of the structure. The subgap differential conductance shows features of ANDREEV REFLECTION and cotunelling processes, which tends to the values of an NS structure for large ds. Above the gap, the differential conductance shows an oscillatory behavior with energy even at very large ds.

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APA: Copy

MOHAMMADPOUR, H., & ZAREIAN, M.. (2008). QUANTUM TRANSPORT IN GRAPHEME NORMAL-METAL SUPERCONDUCTOR- NORMAL-METAL STRUCTURES. IRANIAN JOURNAL OF PHYSICS RESEARCH, 8(2), 81-86. SID. https://sid.ir/paper/1916/en

Vancouver: Copy

MOHAMMADPOUR H., ZAREIAN M.. QUANTUM TRANSPORT IN GRAPHEME NORMAL-METAL SUPERCONDUCTOR- NORMAL-METAL STRUCTURES. IRANIAN JOURNAL OF PHYSICS RESEARCH[Internet]. 2008;8(2):81-86. Available from: https://sid.ir/paper/1916/en

IEEE: Copy

H. MOHAMMADPOUR, and M. ZAREIAN, “QUANTUM TRANSPORT IN GRAPHEME NORMAL-METAL SUPERCONDUCTOR- NORMAL-METAL STRUCTURES,” IRANIAN JOURNAL OF PHYSICS RESEARCH, vol. 8, no. 2, pp. 81–86, 2008, [Online]. Available: https://sid.ir/paper/1916/en

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